A 76 kg rock is rolling horizontally at the top of a vertical cliff that is 20m above the surface of lake.the top of the vertical face of the dam is located 100m from the foot of the cliff with the top of the dam level plain is 25m below the top of the dam.
a) what will be the speed of rock will travel
to the plain without striking the dam?
b) how far from the dam does the rock hit the plain?
2 answers