A ball is thrown up from the top of a building 55.0 m high.

Last updated: 7/10/2022

A ball is thrown up from the top of a building 55.0 m high. It rises to a maximum height of 20.0 m above the roof. (a) When does it land on the ground below? (b) At what velocity does it land? (c) When is it 20.0 m below the roof?