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21 May, 03:07

A pool ball is rolling at a velocity of 12 cm/s to the right when it is hit by another ball. It continues moving right at a velocity of 21 cm/s. If the collision lasts 0.45 seconds, what is the ball's acceleration?

A.+9 cm/s2

B. 20 cm/s2 to the right

C. 26 cm/s2 to the right

D.+46 cm/s2

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Answers (1)
  1. 21 May, 03:30
    0
    B

    Explanation:

    Acceleration = rate of change in velocity

    a = (21-12) / (0.45) = 20cm/s^2
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