A ball is thrown upwards. The ball and the Earth form a closed system.
What happens to the total energy of the system as the ball rises?
It increases as the ball rises higher above the ground
It decreases as the ball slows down on its way upwards
It stays the same as the ball rises and slows down
It falls to zero when the ball reaches its highest point
44 exam-style questions on OCR GCSE Physics 7.1 Work done, covering 7.1.1 Conservation of energy in a closed system, 7.1.2 Energy stores and transfers, 7.1.3 Energy changes by heating, forces and current, 7.1.4 Quantifying energy transfers in a system, and 7.1.5 Kinetic, elastic and gravitational potential energy. Each one has a worked solution and a mark scheme showing where the marks go.