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1.7 Energy, work and power

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Question 43

A car has 780 kJ of kinetic energy. The car brakes and stops in a distance of 120 m.

What is the average braking force acting on the car?

A

0.15 N0.15\text{ N}0.15 N

B

6.5 N6.5\text{ N}6.5 N

C

6500 N6500\text{ N}6500 N

D

94 000 N94\,000\text{ N}94000 N

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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