PL FOR GOD SAKE HELP ME PL

A small coin of mass m is initially at rest. It is dropped from a height h above ground level.
The coin has a speed v as it hits the ground.
The gravitational field strength g is equal to 10N/kg.
(a) State an expression for:
• the gravitational potential energy of the coin at a height h above ground level
gravitational potential energy =

• the kinetic energy of the coin when travelling at a speed v.
kinetic energy = [2] (b) The coin is dropped from the top of a building of height 380m.
Determine the speed of the coin as it hits the ground. You may ignore air resistance.