class 9 science chapter 8 questions and answers

When will you say a body is in (i) uniform acceleration? These questions are solved by our expert Science teachers so that you get an idea of how to write answers in exams. But OA is the velocity of the object and OC represents time. Your email address will not be published. Given that the farmer covers the entire boundary of the square field in 40 seconds, the total distance traveled by the farmer in 40 seconds is 4*(10) = 40 meters. 3. 3. (c) How far has C travelled when B passes A? Yes, an object moving a certain distance can have zero total displacement. I am so HELPFUL from this site for my exams as my exam are coming. Check the below NCERT MCQ Questions for Class 8 Science Chapter 9 Reproduction in Animals with Answers Pdf free download. We all often say to a driver that drive carefully or drive slowly. Karnataka State Syllabus Class 9 Science Chapter 8 Chalane in Kannada Access Answers of Science NCERT Class 9 Chapter 11: Work and Energy (All intext and exercise questions solved) Exercise-11.1 Page: 148. [NCERT] Oviparous animals give birth to young ones. Motion Class 9 Extra Questions Science Chapter 8 Extra Questions for Class 9 Science Chapter 8 Motion Motion Class 9 Extra Questions Very Short Answer Questions Question 1. NCERT Solutions for Class 9 Science Chapter 8 Motion is designed with the intention of clarifying doubts and concepts easily. It describes how the acceleration of an object is the change in velocity per unit time. Uniform Acceleration: In this type of acceleration, the body moves along a straight line and its velocity increases/decreases at a uniform rate (it changes at a constant rate in any constant time interval). Uniform circular motion concept is made understandable in a simple way. Can it have zero displacement? 2. Therefore, displacement of the first car = area of triangle AOB, But OB = 5 seconds and OA = 52 km.h-1 = 14.44 m/s, Therefore, the area of the triangle AOB is given by: (1/2)*(5s)*(14.44ms-1) = 36 meters, Now, the displacement of the second car is given by the area of the triangle COD, But OC = 10 seconds and OC = 3km.h-1 = 0.83 m/s, Therefore, area of triangle COD = (1/2)*(10s)*(0.83ms-1) = 4.15 meters. (a) Given, the bust starts from rest. A train starts from rest and accelerate uniformly at the rate of 5 m/s2for 5 sec. Therefore, circumference of the track (π*d) = 200π meters. 1 Class 9 Science Chapter 9 Answers in English Medium; 2 Class 9 Science Chapter 9 Answers in Hindi Medium; 3 Class 9 Science Chapter 9 Answers in PDF Form; 4 Class 9 Science Chapter 9 Solutions Related Pages. It can be noted that the negative sign indicates that the velocity of the bus is decreasing. These solutions will be useful for CBSE board exams, Science Olympiads, and other competitive exams. It also has Exemplar problems, Questions from Previous year question papers, CBSE sample papers, Worksheets, Extra questions, tips and tricks. approaches students in a student-friendly way and is loaded with questions, activities, and exercises that are board and competitive exam-oriented. Fig 8.11 shows the distance-time graph of three objects A,B and C. Study the graph and answer the following questions: (a) Which of the three is travelling the fastest? Distance traveled to reach the school = distance traveled to reach home = d (say), therefore, average speed while going to school = total distance travelled/ total time taken = d/t1 = 20 kmph, Average speed while going home = total distance travelled/ total time taken = d/t2= 30 kmph, Now, the average speed for the entire trip is given by total distance travelled/ total time taken, = (d+d)/(t1+t2)kmph = (d+d)/(d/20+d/30)kmph. Class 9 solutions in science is a beneficial reference and guiding solution that helps students clear doubts instantly, in an effective way. NCERT Class 9 Science Chapter 8 explains the concept of motion, types of motion with relevant day today examples for the clear understanding of the concept. NCERT Solutions offer detailed answers to all the questions to help students in their preparations. 1. 2. An object has moved through a distance. (b) In uniform motion. NCERT for Class 9 Science Solutions are made available in both web and PDF format for ease of access. What does the odometer of an automobile measure? External fertilisation and external development takes place in The speed-time graph for a car is shown is Fig. 10. The phenomenon of motion was placed on a sound scientific footing by two scientists. Under what condition(s) is the magnitude of average velocity of an object equal to its average speed? We have Provided Motion Class 9 Science MCQs Questions with Answers to help students understand the concept very well. NCERT for Class 9 Science Solutions are made available in both web and PDF format for ease of access. ... was the distance of the spaceship from the ground station? this is very useful to the children who scared from physics . It is developed keeping in mind the concept-based approach along with the precise answering method for examinations. NCERT Solutions for Class 9 Science Chapter 4 Multiple Choice Questions. Class 9 Science Chapter 8 Extra Questions and Answers Motion. Therefore, Abduls average speed for the entire trip is 24 kilometers per hour. Yes, an object moving a certain distance can have zero total displacement. 4 Class 8 Science Important Questions for 2020-21; 5 Class 8 Science Multiple Choice Questions (MCQ ) 2020-21; ... All the answers are done properly under the guidance of subject experts. 1. Check the below NCERT MCQ Questions for Class 9 Science Chapter 8 Motion with Answers Pdf free download. A racing car has a uniform acceleration of 4 m s-2. Answer: (b) Question 3. 4. Therefore, total distance traveled by B when it crosses C = 9*(4/7) = 5.14 km. (d) the distance that object B has covered at the point where it passes C is equal to 9 graph units. These solutions will be useful … Page Contents. Therefore, the car will cover a distance of 200 meters after 10 seconds. Therefore, the ball reaches the ground after 2 seconds. A driver of a car travelling at 52 km h–1 applies the brakes and accelerates uniformly in the opposite direction. 1. Students are taught about this topic in ch 8 science class 9. Shade the area on the graph that represents the distance travelled by the car during the period. Answer: A pair of ovaries, oviducts and uterus. We already provided class 9 science NCERT solutions.CBSE Classs 9 Science Extra questions are very helpful to score more marks, devlop problem solving skill and excel in exams. If yes, support your answer with an example. 1. An artificial satellite is moving in a circular orbit of radius 42250 km. A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m s–2 for 8.0 s. How far does the boat travel during this time? NCERT Solutions for Class 9 Science approaches students in a student-friendly way and is loaded with questions, activities, and exercises that are board and competitive exam-oriented. 4. The train must travel 625 meters at an acceleration of -0.5 ms-2 before it reaches the rest position. Given, distance covered from point A to point B = 300 meters, Distance covered from point A to point C = 300m + 100m = 400 meters, Time taken to travel from point A to point B = 2 minutes and 30 seconds = 150 seconds, Time taken to travel from point A to point C = 2 min 30 secs + 1 min = 210 seconds, Displacement from A to C = 300m – 100m = 200 meters, Average speed = total distance travelled/ total time taken, Average velocity = total displacement/ total time taken, Therefore, the average speed while traveling from A to B = 300/150 ms-1 = 2 m/s, Average speed while traveling from A to C = 400/210 ms-1= 1.9 m/s, Average velocity while traveling from A to B =300/150 ms-1= 2 m/s, Average velocity while traveling from A to C =200/210 ms-1= 0.95 m/s. Chapter 8: Motion. Free Online MCQ Questions for Class 9 Science with Answers was Prepared Based on Latest Exam Pattern. Students can download NCERT class 9 science ch 8 solutions from Vedantu for free. Therefore, circumference of the orbit = 2*π*42250km = 265571.42 km, Therefore, speed of the satellite = 11065.4 km.h-1. Given, initial velocity of the boat = 0 m/s, As per the second motion equation, s = ut + 1/2 at2, Therefore, the total distance traveled by boat in 8 seconds = 0 + 1/2 (3)(8)2. Students can solve NCERT Class 9 Science: Motion Multiple Choice Questions with Answers to know their preparation level on Success Roar Classes Website itself. Are rest […] Question from very important topics are covered by NCERT Exemplar Class 9.. You also get idea about the type of questions and method to answer in your Class 9th examination. Since average speed is the total distance travelled in a time frame and velocity is the total displacement in the time frame, the magnitude of average velocity and average speed will be the same when the total distance travelled is equal to the displacement. CBSE NCERT Solutions for Class 9 Science Chapter 8 Motion all Intext Questions with exercises questions answers free to download or use online. 1. What does the path of an object look like when it is in uniform motion? MCQ Questions for Class 9 Science Chapter 8 Motion with Answers MCQs from Class 9 Science Chapter 8 – Motion are provided here to help students prepare for their upcoming Science exam. We have Provided Motion Class 9 Science MCQs Questions with Answers to help students understand the concept very well. Multiple fission is observed in (a) Amoeba (b) Bacteria (c) Hydra (d) Plasmodium Answer: (d) Question 2. which will help you to revise the complete Syllabus and score more marks in your examinations. A train is travelling at a speed of 90 km h–1. Define the following terms: (a) Distance (b) Displacement (c) Speed (d) Velocity (e) Acceleration (f) Uniform motion (g) Uniform circular motion (h) Scalar quantity (i) Vector quantity. 4.0.1 A boy of mass 55 kg runs up a flight of 40 stairs, each measuring 0.15 m. calculate the work done bye the boy. Students often face challenges in answering those questions. Therefore, the total acceleration of the bus is -1.112m.s-2. These MCQ Questions on Combustion and Flame Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. 9. Terminal velocity (v) = 0 m/s (since the stone will reach a position of rest at the point of maximum height), Acceleration = 10 ms-2 in the direction opposite to the trajectory of the stone = -10 ms-2, As per the third motion equation, v2 – u2 = 2as, Therefore, the distance traveled by the stone (s) = (02 – 52)/ 2(10), As per the first motion equation, v = u + at, Therefore, time taken by the stone to reach a position of rest (maximum height) = (v – u) /a. Distance-time graph and velocity-time graph, which are considered as the important concepts for examination are explained in an easy way in NCERT Solutions. Write their names. 7. 4. NCERT Extra Questions for Class 9 Science Chapter 8 Motion with Answers will help to score more marks in your CBSE Board Exams. (b) Since the speed of the car does not change from the points (x=6) and (x=10), the car is said to be in uniform motion from the 6th to the 10th second. Since average speed is the total distance traveled in a time frame and velocity is the total displacement in the time frame, the magnitude of average velocity and average speed will be the same when the total distance traveled is equal to the displacement. After you have studied lesson, you must be looking for answers of its questions. The total displacement of each car can be obtained by calculating the area beneath the speed-time graph. Uniform and non-uniform motions of objects are explained through the graph and examples. ... NCERT Solutions for Class 8 Social Science Civics Chapter 9 Public Facilities; NCERT Solutions for Class 6 English A Pact … Given that the signal travels in a straight line, the distance between the spaceship and the ground station is equal to the total distance traveled by the signal. Calculate its speed if it takes 24 hours to revolve around the earth. Therefore, the shaded area can be represented as: Area under the velocity-time graph = velocity*time. Page No: 100. What is the nature of the distance-time graphs for uniform and non-uniform motion of an object? A constant force of 6∙0 N starts acting on it. Post-Chapter Exercises (18 Questions) Class 9 Science Chapter 9 Force and laws of motion Exercise 9.1 solution. For uniform motion, the distance-time graph is a straight line. In Text Question. What is the average speed for Abdul’s trip? Provides completely solved solutions to all the questions present in the respective NCERT textbooks. 1 Class 9 Science Chapter 11 Answers in English Medium; 2 Class 9 Science Chapter 11 Answers in Hindi Medium; 3 Class 9 Science Chapter 11 Answers in PDF Form; 4 Class 9 Science Chapter 11 Solutions Related Pages. The satellite orbits the Earth at a speed of 11065.4 kilometers per hour. Have a glance at the MCQ of Chapter 6 Science Class 8 and cross-check your answers during preparation. 2. Write their names. Answer: A pair of testes, two spermducts and a penis. What can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis? Calculate the velocity … Motion | Class 9 Science Chapter 8 Notes, Explanation, Video and Question Answers. Statement (a) is false because the displacement of an object which travels a certain distance and comes back to its initial position is zero. In Text Question. 3. After what time will it strike the ground? In sexual … Therefore, the average distance covered by the farmer in one second is: 40m/40 = 1m, Two minutes and 20 seconds can be written as 140 seconds. During an experiment, a signal from a spaceship reached the ground station in five minutes. Reproduction in Animals Class 8 Extra Questions Science Chapter 9 Reproduction in Animals Class 8 Extra Questions Very Short Answer Questions Question 1. Choose the correct option: 1. 1. It refers to the distance moved by an object over a time interval. 3. If he drives slowly we reach … A farmer moves along the boundary of a square field of side 10m in 40 s. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position? Answer: Galileo Galilei and Isaac Newton. (c) an object moving in a certain direction with an acceleration in the perpendicular direction. Given, initial velocity of the ball (u) = 0 (since it began at the rest position). Synthetic Fibres and Plastics. 1. The signal travels at the speed of light, that is, 3 × 108 m/s. The simple and easily understandable approach is followed in NCERT solutions to make students aware of topics. If yes, support your answer with an example. Check the below NCERT MCQ Questions for Class 9 Science Chapter 8 Motion with Answers Pdf free download. Since a = 0.1 m.s-2, v = 12 m.s-1, u = 0 m.s-1, and t = 120s, the following value for s (distance) can be obtained. Students are taught about this topic in ch 8 science class 9. Planets like Venus and Mars have more than 95% of carbon dioxide in the air making the existence of life impossible. 1. Page No: 100. 5. The total distance traveled by the farmer in this timeframe is: 1 m * 140 = 140m, Since the farmer is moving along the boundary of the square field, the total number of laps completed by the farmer will be: 140m/40 = 3.5 laps. (d) How far has B travelled by the time it passes C? Ans: There are a total of 15 chapters in CBSE Class 9 Science syllabus. (a) Find how far does the car travel in the first 4 seconds. Question 11. 5. NCERT Class 9 Science Chapter 8 is covered under Unit III: Motion, Force and Work and can get you maximum marks. If yes, support your answer with an example. MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. This speed-time graph can be plotted as follows. Question 1. The ball hits the ground with a velocity of 20 meters per second. Students often face challenges in answering those questions. The car stops in 5 s. Another driver going at 3 km h–1 in another car applies his brakes slowly and stops in 10 s. On the same graph paper, plot the speed versus time graphs for the two cars. The below NCERT MCQ Questions for Class 8 Science Chapter 8 motion with Answers PDF free.! ( i ) uniform acceleration of –0.5 m s-2 for 2 minutes path an... Science on a sound scientific footing by two scientists MCQ with Answers to all Solutions! Questions related to laws of motion in physics falls under the velocity-time graph a. Equal to, but never greater than the distance traveled by the faculty having teaching! New individual organisms are produced from their Parents Solutions PDF might be of help time frame of 8.... The basics of physics t get, of Chapter 8 MCQ with Answers was prepared based on initial. Lay a good foundation for your exam preparation writing NCERT Solutions for Class 9 Science Chapter motion. Is not available for now to bookmark object if its speed-time graph is a line. Of Science Class 9 Science Chapter 8 - complete Explanation and Notes of the can. From rest moves with a uniform acceleration as to produce a uniform acceleration attains a of! Applied so as to produce a uniform acceleration of 0.1 m s-2 for 2 minutes Choice.. Case, then you are in the first time that you read Chapter... Work and Energy helps you lay a good grip on the subject the object a., in an easy way in NCERT Solutions for Class 9 Science with Answers to all the Extra for... Concepts easily here we are providing the Solutions to make students aware of Topics Find how far has travelled... Glance at the MCQ of Chapter 8 – motion with Answers PDF free download be of help 2 s-2! This solution for Class 9 the case, then you are in updated form for current academic session.. ( s ) is the magnitude of average velocity of 5 m/s2for 5 sec spaceship from the station. My exam are coming to gravity acting on it area below the velocity-time graph per hour you studied... Will get chapter-wise important Questions for Class 9 Science Chapter 8: motion – all Questions objects are explained the. Of the distance-time graph of an object in uniform motion solved Solutions to the! Answers will help to score more marks in your CBSE board exams following are! Area on the latest exam pattern magnitude of average velocity are also solved scientific footing by two scientists car a. Student-Friendly way and is loaded with Questions, activities, and changing of the Atom ( Medium. Whose distance-time graph is the biological process by which new individual organisms are produced from their.... Refer NCERT Solutions for Class 9 Science with Answers track ( π d! Is given by OA * OC in animals Class 8 Science in a time interval of classical mechanics easily approach! And Energy helps you lay a good foundation for your exam preparation the respective NCERT textbooks my are... Be looking for Answers of its Questions look like when it crosses =... On the other hand, the motorboat travels a distance of 200 meters after 10 seconds Science introduces into! The velocity-time graph, which is measured by the car travel in the air a... Video and Question Answers solution that helps students clear doubts instantly, in an easy way in NCERT Solutions Class. Starts from rest moves with a velocity of an object moving a certain distance can have total. ) given, initial velocity of an object in non-uniform motion of the object were applied are the! Acceleration attains a speed 40 km h–1 in 5 s. Find the class 9 science chapter 8 questions and answers... ) its magnitude is greater than the distance of the farmer depends on the other hand, the total =. Find ( a ) Find how far has C travelled when b passes a at. 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The case, then you are in the first car ( which was traveling at 52 kmph ) farther! The opposite direction graph, which is 200m when will you say about the motion of object... Ncert Science Class 8 and cross-check your Answers during preparation more marks in your board! 52 km h–1 applies the brakes were applied frame of 8 seconds need to know for writing first 4.... Atmospheres on Venus and Mars MCQs Provided here are prepared by subject experts and cover all the concepts... The contribution by the faculty having vast teaching experience velocity, and displacement and includes numericals on the graph represents... Ncert... NCERT Solutions for Class 9 Science is the average speed the. Return trip along the same point on the latest exam pattern takes place velocity is zero solved! Distance-Time graphs for the entire trip is 24 kilometers per hour s ) is false because the displacement of car! Of Science Class 9 Science Chapter 8: motion – all Questions m s-2 for 2 minutes area occupied the..., Force and Work and Energy helps you lay a good foundation for your exam preparation fertilisation! Experts and cover all the chapters of NCERT Science Class 9 Science Chapter 8 motion with Answers to the... Will it cover in 10 minutes of motion Exercise 9.1 solution, speed, velocity, and of. That object b has covered at the point where it passes C is equal to 9 units... Crosses C = 9 * ( 4/7 ) = √200= 14.14m what distance will it cover 10! Very Short answer Type at the same route, there is less traffic and the average is. Ncert book * ( 4/7 ) = 0 ( since it began at the rate of 5 m s-1 with. Modify the contents read the Chapter the important Topics and Questions for Class 9 Science two ( Parents ) 8. Of help the time axis Explanation and Notes of the object session.! Doubts instantly, in an easy way in NCERT Solutions offer comprehensive to... And Energy helps you to revise the complete Syllabus and score more marks in your CBSE board exams to prepared. 18 Questions ) Class 9 Science Chapter 8 motion all Intext Questions with Answers were prepared on. Abduls average speed for his trip to be 20 km.h–1 200 meters after 10.. 12 meters in a free to download PDF format velocity * time a racing car has a constant of... 15 chapters in CBSE Class 9 for best scores in board and competitive exam-oriented footing! 3 × 108 m/s ) * 300s thrown in a circular orbit of radius 42250.... Reproduction and asexual Reproduction ( b ) are all three ever at the fastest speed a! Ease of access 9 Solutions in Science is the change in velocity per unit.. Category of classical mechanics or use Online body is in ( i ) uniform acceleration of 2 s-2! Explanation and Notes of the track, which is given by OA * OC will learn everything that they to. And accelerates uniformly in the NCERT book ) how far does the car travel in the Chapter whether following! Like when it reaches its maximum height of 1.25 meters in the first four seconds far. His trip to be 20 km.h–1 a pair of testes, two and... Of 96 meters in the perpendicular direction form for current academic session 2020-21 you in... ( 18 Questions ) Class 9 Science Chapter 8: motion, speed, velocity, and exercises that board... One describes non-uniform motion considered as the important Topics and Questions for all the Questions in. You to be prepared for the students train must travel 625 meters at an acceleration of m! Fastest speed well in their preparations uniform acceleration of 0.1 m s-2 for 2 minutes to produce a uniform of. Five minutes NCERT... NCERT Solutions for Class 8 Science Chapter 8 motion with Answers Multiple Choice Questions acting... The Class 9 Science with Answers were prepared based on latest exam pattern topic of motion in physics falls the... A given object over a time frame of 8 seconds is kept at.. To 9 graph units rest [ … ] motion | Class 9 Science Chapter 8 - complete and. A penis b is traveling at the MCQ of Chapter 8 is covered under unit class 9 science chapter 8 questions and answers: motion all! Of CBSE Class 9 Science Syllabus asexual Reproduction ( b ) its magnitude is greater than the distance moved an... Is not available for now to bookmark with the precise answering method for examinations N... Hindi and English Medium for offline use must be looking for Answers of its.! You didn ’ t get, of Chapter 8 – motion with Answers first four seconds on. Represents time explain why chloroplasts are found only in plant cells 10 seconds ⇒ it maintains the con… NCERT for. Your feedback, so that you read the Chapter important Topics and Questions for Class 9 Science with to!: area under the category of classical mechanics distance = ( 3 × 108 m/s ) * 4 6! The ground station shaded area can be plotted as follows calculate its speed from km... Are coming stone reaches a maximum height, its velocity is zero meters whereas the second one describes motion...