Two identical archive drawers are pulled open through the same distance by separate motors. Their motion is the same. Drawer R is fitted with rollers so friction is negligible. Drawer S slides against the cabinet, so friction acts as it moves.
Which statement is correct?
Both motors transfer energy only to the kinetic energy stores of the drawers.
Motor S does less work because friction transfers energy away from the drawer.
Motor S does more work because it transfers energy to thermal energy stores as it overcomes friction.
Motor R does more work because its force acts over the full distance moved.
113 exam-style questions on AQA GCSE Physics 5.2 Work done and energy transfer, covering 5.2 Work done and energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.