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If a ball is dropped from a height and reaches a velocity of 1 5 m / s downward the instant it reaches the ground

If a ball is dropped from a height and reaches a velocity of

15

/

s downward the instant it reaches the ground and the bounces back up and leaves the ground with a velocity of

10.5

what is the coefficient of restitution between the ball and the ground?

(

please answer to two decimal places

)

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