# Rectilinear motion: Calculation of velocity

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A billiard ball is hit and travels in a line. If s centimeters is the distance of the ball from its initial position at t seconds, then s=100t2 + 100t. If the ball hits a cushion that is 39cm from its initial position, at what velocity does it hit the cushion?

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Velocity is calculated from displacement. The rectilinear motion of a ball is examined. The velocity of a hit cushion is provided.

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