Table 3.1 shows some missing information for the input energy and the useful output energy of several devices, and it is fully finished only for the microphone.
(a)[3]
Fill in all the empty spaces in Table 3.1.
(b(i))[2]
Complete the sentences about energy transfers. 1. As the player swings the tennis racket, his body changes ................ energy into ................ energy. 2. As the tennis ball moves upwards, it gains ................ energy.
(b(ii))[1]
Explain why the height reached by the ball gets smaller after each bounce.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Heat energy” …