What is the momentum of a 4 kilogram object moving at 5 metres per second?
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Correct!
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Correct answer to question 4 (Mechanical Comprehension): 20 kilogram-metres per second
Method
Momentum is mass times velocity, so 4 x 5 = 20. It is why a slow heavy vehicle can be as hard to stop as a fast light one.
Updated: November 2026
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