Kinetic energy, ke

1 mark · Normal

Which of the following objects has the greatest kinetic energy?

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Correct option: A 10 kg bicycle moving at 12 m/s

Common mistakes: Picking the largest mass or speed but not both in calculation

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Marking points

A1 · 1 mark · Correct option selected

Worked solution

Calculate KE for each option: KE = 1/2 mv^2.

A: 0.5 x 50 x 16 = 400 J

B: 0.5 x 10 x 144 = 720 J

C: 0.5 x 1 x 400 = 200 J

D: 0.5 x 70 x 4 = 140 J

Bicycle (option 2/B) has the greatest kinetic energy.