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16 June, 16:28

A ball with a mass of 5 kg is acted upon by a force of 20 N. If the ball begins moving from a velocity of 0 m/s and accelerates for 2 seconds, what is its change in velocity?

A. 0 m/s B. 2 m/s C. 4 m/s. D. 8 m/s

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  1. 16 June, 16:54
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    The answer is d

    F=ma. so by substituting we find that a=4

    and a=vi-vf/t

    by substiting we find vf=8

    so the difference is vf-vi = 8m/s
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