Fig. 3.1 illustrates a cabin that carries passengers up a hillside. The cabin is fastened to a cable that travels horizontally from A to B, and then climbs the hill from B to C. The diagram shows pulleys, a cable, a cabin, points A, B and C, a vertical height of 50 m, and a drive pulley linked to an electric motor.
(a)[2]
Put two ticks beside the forms of energy that rise as the cabin moves horizontally at constant speed from A to B.
Kinetic energy of the cabin
Gravitational potential energy of the cabin
Gravitational potential energy of the cable
Internal energy of the surroundings
Internal energy of the wires of the motor
(b)[2]
Calculate the increase in gravitational potential energy of the cabin and passengers as they move from B to C.
(c)[3]
Explain the environmental and economic advantages of this arrangement.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “the internal energy of the surroundings (Box 4)” …