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.
Practise AQA GCSE Physics Energy changes in a system, and the ways energy is stored before and after such changes with exam-style questions for Foundation and Higher tier. 64 questions covering Energy stores and systems, Changes in energy, Energy changes in systems, and Power, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.