Question

what is acceleration​

Answer 1

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Acceleration is the rate of change of velocity.

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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.

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Answer 2

$\bf\colorbox{green}{Answer:-}$

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.