Question

define acceleration and give its si unit when is acceleration of body negative ? give two exmaple of stitution in which acceleration of the body

Answer 1

Answer:

Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.

The SI unit of acceleration is meter per second squared ($m/s^{2}$)

The acceleration of body can be negative when the body is decreasing its speed.

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