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1.7 Energy, work and power

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Question 7

An athlete holds onto a gym bar and pulls herself up until her chin is level with the bar.

She raises her body through 60 cm in 1.2 s.

The weight of the athlete is 700 N.

What is the average power she produces as she raises herself?

A

35 W35\text{ W}35 W

B

350 W350\text{ W}350 W

C

3500 W3500\text{ W}3500 W

D

35 000 W35\,000\text{ W}35000 W

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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