A hockey puck is sliding in a straight line

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A hockey puck is sliding in a straight line. Its speed decreases uniformly from

15\,\text{m}\,\text{s}^{-1}

to

3.0\,\text{m}\,\text{s}^{-1}

in

4.0\,\text{s}

. Determine the average acceleration of the puck during this time.

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