9th Class (CBSE) Science: Motion

Question: A bus decreases its speed from 80 km h^-1  to 60 km h^-1 in 5 s. Find the acceleration of the bus.

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Question: A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h^-1  in 10 minutes. Find its acceleration.

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Question: What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?

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Question: What can you say about the motion of on object whose distance-time graph is a straight line parallel to the time axis?

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Question: What can you say about the motion of on object its speed-time graph is a straight line parallel to the time axis?

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The body is moving with a uniform speed and zero acceleration.

Question: A bus starting from rest moves with a uniform acceleration of 0.1 ms^-2  for 2 minutes. Find (a) the speed acquired, (b) the distance travelled.

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