Or search by topic
A ball A of mass 2m is at the top of a frictionless chute at height 5h above the ground and another ball B of mass m is at rest on the horizontal surface at the end of the chute at height h above the ground. Ball A starts to slide from rest down the chute and hits ball B which is projected, after the impact, off the end of the chute. If the coefficient of restitution between the balls is 0.5, how far does ball B go horizontally before it hits the ground?
Gravity on the Moon is about 1/6th that on the Earth. A pole-vaulter 2 metres tall can clear a 5 metres pole on the Earth. How high a pole could he clear on the Moon?
How high can a high jumper jump? How can a high jumper jump higher without jumping higher? Read on...
How fast would you have to throw a ball upwards so that it would never land?