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1.7 Energy, work and power

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Question 15

A toy consists of a small mass suspended vertically from a stretchable elastic cord. The mass is pulled down to an extension point D D\,D and released from rest. It then oscillates vertically between point D D\,D and a highest point UUU.

Assuming there is no air resistance, which of the following groups contains all the forms of energy that alternately increase and decrease during these oscillations?

A

Gravitational potential energy, kinetic energy, and elastic potential energy

B

Gravitational potential energy and kinetic energy only

C

Elastic potential energy and kinetic energy only

D

Internal energy, gravitational potential energy, and kinetic energy

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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