A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2022 · Q171 Mark

A rock of mass 40 kg is released from rest from a height of 20 m above the surface of a planet. The rock has a kinetic energy of 32 kJ when it hits the surface of the planet. The planet does not have an atmosphere. What is the weight of the rock on the surface of the planet?

A1.6 N

B390 N

C1.6 kN

D64 kN

✓ Correct answer

C: 1.6 kN

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2022 Paper 1 Variant 2, question 17.

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