A ball is thrown vertically upward with an initial speed of 15 m/s from 80 m above the ground . Assume free fall conditions . -LRB- a -RRB- What is the max height ? -LRB- b -RRB- Determine the magnitude of the velocity at 40 m above ground . -LRB- c -RRB- At what speed does the ball strike the ground ?
A ball thrown horizontally from the top of a building 55m high strikes the ground at a point 35m from the building . What is the -LRB- a -RRB- time to reach the ground , -LRB- b -RRB- the initial speed of the ball , and -LRB- c -RRB- the velocity by which the ball will strike the ground ?