You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.3 m above the ground, and it is moving at a speed of 7.8 m/s.
(a) How much time does it take for the tennis ball to reach its maximum height? s
(b) What is the maximum height above the ground that the tennis ball reaches? m
(c) When the tennis ball is at a height of 2.2 m above the ground, what is its speed? m/s