The law of Conservation of Energy states that energy cannot be created or destroyed - it can only be transferred from one type to another.
What is the kinetic energy of a mass travelling at ?
What is the mass of a body with of travelling at ?
What is the gain in potential energy of a mass, above the ground?
At what height is a mass when it has gained of on Earth?
Assuming no energy losses, how much kinetic energy does a mass have when dropped from a high building?
What is the speed of a mass on reaching the ground when dropped from a high building?
If a body is propelled directly upwards at , what height will it reach?