Question
Question: A cyclist of total mass 75 kg (cyclist + bike) is travelling at 8.0 m/s. Calculate the kinetic energy of the cyclist and bike.
Mark scheme (3 marks):
- Correct equation: Eₖ = ½ m v² [1]
- Correct substitution: Eₖ = 0.5 × 75 × 8.0² (= 0.5 × 75 × 64) [1]
- Correct answer with unit: 2,400 J (accept 2.4 kJ) [1]
ECF: if v² is omitted (gives 300 J), award marks 1 and 2 only. Reject negative answers.
3 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.