Physics (AS & A Level) · May / June 2020 · Paper 13 · Question 16

A trolley starts from rest at X. It rolls down to Y and eventually comes to rest at Z. Which row is a possible summary of the energy changes during this process? | | X to Y | Y to Z | |---|---|---| | A | PE → KE | KE → PE | | B | PE → KE | KE → PE + heat | | C | PE → KE + heat | KE → PE | | D | PE → KE + heat | KE → PE + heat | key: PE = potential energy, KE = kinetic energy

1. APE → KE ; KE → PE
2. BPE → KE ; KE → PE + heat
3. CPE → KE + heat ; KE → PE
4. DPE → KE + heat ; KE → PE + heat

As printed in the paper