O-LevelPhysicsEnergy & Work5054/22 · Oct/Nov 2014 · Q45 Marks

Fig. 4.1 shows a black car going up a hill on a bright, sunny day. [Figure 4.1]

(a)(i)State one way in which the car is gaining thermal energy,[1]
(a)(ii)State one way in which the car is losing thermal energy.[1]
(b)The car accelerates up the hill. In addition to the changes in the thermal energy of the car, there are other energy changes taking place. Describe the other energy changes occurring as the car moves.[3]

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Mark scheme

Marking points from the official mark scheme (Oct/Nov 2014). The mark or mark type is shown in brackets.

[1] heat gained from burning fuel/combustion or friction between moving parts/with air/road or from (radiation of) Sun
[1] heat lost to air/surroundings or by convection (currents) or exhaust/hot gases/fumes or from exhaust or heat emitted (by hot car) or by radiation
[1] at start chemical energy decreases
[1] or at start chemical energy to gravitational/potential energy (of car) increases
[1] or at end of process kinetic energy (of car or air) increases

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