CBSE Class 9 Science Question 19 of 30

Motion — Question 1

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Question

Question 1

When will you say a body is in

(i) uniform acceleration?

(ii) non-uniform acceleration?

Answer

(i) The acceleration is said to be uniform (or constant) when equal changes in velocity take place in equal intervals of time.

Example — The motion of a body under gravity (e.g., free fall of a body)

(ii) If changes in velocity are not same in the same intervals of time, the acceleration is said to be non-uniform.

Example — The motion of a vehicle on a crowded road.