. A man on the edge of a platform 8 ft above the ground throws a ball vertically upwards with an initial velocity of 28 ft/s. Assuming that the only force acting on the ball is acceleration. due to gravity (-32 ft/s2).  *What is the speed of the ball when it hits the ground? *How long does it take for the ball to reach its maximum height?

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Hello good day! I want to ask help with this question. I know this a physics problem but this was given by our calculus teacher as an assignment and should be solved in a calculus approach. Thank you!

1. A man on the edge of a platform 8 ft above the ground throws a ball vertically upwards with an initial velocity of 28 ft/s. Assuming that the only force acting on the ball is acceleration.
due to gravity (-32 ft/s2). 

*What is the speed of the ball when it hits the ground?

*How long does it take for the ball to reach its maximum height?

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