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GCSE Questions: Energy Changes

Q3. The illustration shows a cyclist riding along a flat road.

(a) As the cyclist accelerates, the energy store in the cyclist's body decreases. What type of energy is the energy stored in the cyclist's body?

Chemical energy

[1 mark]

(b) As the cyclist accelerates, what type of energy of the cyclist increases?

Kinetic energy

[1 mark]

(c) Given that the mass of the cyclist is 80 kg and the speed of the cyclist is 12 m/s. Calculate the kinetic energy of the cyclist.

KE = ½ mv2

KE = ½ 80 x 122

KE = 40 x 144

KE = 5760 J

Figures are given to significant figure so the answer should be quoted as 5800 J

[3 marks]

[Total 5 marks]