Question

A ball thrown vertically upwards with an initial speed of 30m/s from the top of a cliff falls into the water 10seconds later directly below the cliff. Find

1.How high the ball went above the cliff
2.How high the cliff is ,neglecting air resistance

Answer 1

1. KEi = PEf
(1/2)m(30)^2= m(10)h
h=45m

Answer 2

1. about 15 feet
2 depending the force of the air resictance, it could be many answers