A spring-loaded launcher fires a ball vertically upwards. The ball has a weight of 0.60 N. The launcher, ball, Earth and surrounding air are treated as a closed system.
The table shows the changes in energy stores between the release of the spring and the moment the ball has risen 2.0 m above its starting position.
| Energy store | Change in energy |
|---|---|
| elastic potential energy store of the spring | decreases by 2.40 J |
| kinetic energy store of the ball | increases by 0.85 J |
| gravitational potential energy store of the ball and Earth | increases by ? |
| thermal energy stores of the launcher and surrounding air | increase by ? |
Calculate the increase in the thermal energy stores of the launcher and surrounding air.
115 exam-style questions on Edexcel GCSE Physics 8.1 Energy transfers and work, covering 8.1.1 Energy stores and transfer diagrams, 8.1.2 Ways of changing a system's energy, and 8.1.3 Work done by forces. Each one has a worked solution and a mark scheme showing where the marks go.