A gymnast leaves a springboard with a speed of 4.0 m/s4.0\text{ m/s}4.0 m/s and has 440 J440\text{ J}440 J of kinetic energy at that instant.
Calculate the mass of the gymnast.
State the equation used and show your working.
44 exam-style questions on AQA GCSE Physics 1.1 Energy changes in a system, and the ways energy is stored before and after such changes, covering 1.1.1 Energy stores and systems, 1.1.2 Changes in energy, 1.1.3 Energy changes in systems, and 1.1.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.