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8 Energy – forces doing work

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Question 49
F

A cyclist rides along a straight, level road at a steady speed.

The driving force on the bicycle is 40 N.

The cyclist travels 600 m in 120 s.

a.

State the equation linking work done, force and distance moved in the direction of the force.

[1]
b.

Calculate the work done by the driving force.

[2]
c.

Calculate the useful power output of the cyclist.

[2]
d.

The body of the cyclist transfers energy from its chemical store at a rate of 800 W.

Calculate the efficiency of the cyclist.

[2]
e.

Give the energy store that most of the wasted energy is transferred to.

[1]
Markscheme

8 Energy – forces doing work Questions

  1. GCSE
  2. /Physics
  3. /8 Energy – forces doing work

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