A toy frog contains a spring.
The spring is compressed by pushing down on the frog with an average force of 12 N.
The frog moves down 4.0 cm while the spring is compressed.
Calculate the work done in compressing the spring.
State the energy store of the spring that increases.
The frog is released and jumps vertically upwards.
The frog has a weight of 0.30 N and rises to a maximum height of 1.2 m.
Calculate the increase in the gravitational store of the frog.
Explain the difference between your answers to (a) and (c).
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.