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1.7 Energy, work and power

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Question 11

A brick of mass 6.0 kg is lifted from the ground and placed on a ledge. The brick gains 108 J of gravitational potential energy.

The brick falls off the ledge. Air resistance can be ignored.

At what speed does the brick hit the ground?

A

4.2 m/s4.2\text{ m/s}4.2 m/s

B

6.0 m/s6.0\text{ m/s}6.0 m/s

C

18 m/s18\text{ m/s}18 m/s

D

36 m/s36\text{ m/s}36 m/s

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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