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1.7 Energy, work and power

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Question 110

A vehicle is moving along a straight horizontal track. The vehicle has 2.4 MJ2.4\text{ MJ}2.4 MJ of kinetic energy. It then accelerates for 25 s until its kinetic energy increases to 3.8 MJ3.8\text{ MJ}3.8 MJ. What is the minimum average power developed by the vehicle's engine during this acceleration?

A

56 W56\text{ W}56 W

B

248 W248\text{ W}248 W

C

56 kW56\text{ kW}56 kW

D

248 kW248\text{ kW}248 kW

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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