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A soccer ball is released from rest at the top of a grassy incline. After 8.6...

A soccer ball is released from rest at the top of a grassy incline. After 8.6 seconds, the ball travels 77 meters and 1.0 s after this, the ball reaches the bottom of the incline.

a) What was the magnitude of the ball's acceleration, (assume it to be constant)?
b) How long was the incline?
c) What angel does the incline make with the horizontal?

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