Question

19.
Rate of change of velocity is called.
( a ) retardation
(b) acceleration
(c) deceleration
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Answer 1

Answer:

Acceleration is defined as the rate of change of velocity. Velocity is a vector, which means it contains a magnitude (a numerical value) and a direction. So the velocity can be changed either by changing the speed or by changing the direction of motion (or both).

Explanation:

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