Which ball has the greater speed at the instant of release?
the ball thrown upward
the ball thrown downward
Neither; the speeds are the same.
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Part D
Which ball has the greater average speed during the 1-s interval after release (assuming neither hits the ground during that time)?
the ball thrown upward
the ball thrown downward
Neither; the average speeds of both balls are the same.
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Part E
Which ball hits the ground with greater speed?
the ball thrown upward
the ball thrown downward
Neither; the balls hit the ground with the same speed.