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1.7 Energy, work and power

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Question 28

Four boxes, each weighing 150 N150\text{ N}150 N, are lifted together from the ground onto a shelf that is 1.8 m1.8\text{ m}1.8 m above the ground. The process takes 3.0 s3.0\text{ s}3.0 s to complete.

How much useful power is produced to lift the boxes?

[3]
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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