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Sliding Box

Problem

A 10kg box is placed on the back of a lorry, and as the lorry accelerates uniformly from 0 to 36 kmh-1 in 5 seconds, the box begins to slide. The lorry then continues to drive at a constant speed and the box comes to rest.

If the box slides 2 metres in total, and assuming g=9.8 ms-2, find μ, the coefficient of friction between the box and the surface.

Problem ID: 155 (Feb 2004)     Difficulty: 4 Star

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