Chapter 8 | Motion | Class 9th Science | Support Material

Class 9^th | Chapter 8 | Motion | Support Material | Assignment Questions

1.Change the speed 6 m/s into km/hr.

2. What do speedometer and odometer used for?

3. What is the other name of negative acceleration?

4. What does the slope of distance-time graph indicate?

5. What can you say about the motion of a body if its speed-time graph is a straight line parallel to the time axis?

6. What does the slope of speed-time graph indicate?

7. Name the physical quantity which gives an idea of how slow or fast a body is moving?

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1. A tortoise moves a distance of 100 m in 15 minutes. What is its average speed in km/hr?

2. If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m/s², how long will it take to come to rest?

3. What is the difference between uniform linear motion and uniform circular motion?

4. Explain why the motion of a body which is moving with constant speed in a circular path is said to be accelerated.

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1. Derive the equations

v = u + at | s = ut + ½at²| v² = u² + 2as | Graphically.

2. What is uniform circular motion? Give two examples which force is responsible for that.

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1. What can you say about the motion of a body if its displacement-time graph and velocity-time graph both are straight line?

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