Two students are playing hockey with 0.4-N wad of paper. One student hits the wad and it slides across his desk, slowing down at a rate of 0.6 m/s/s. Find the coefficient of kinetic friction between the wad and the desk?

Question

Austin Douglas

Physics

14 September, 15:41

Two students are playing hockey with 0.4-N wad of paper. One student hits the wad and it slides across his desk, slowing down at a rate of 0.6 m/s/s. Find the coefficient of kinetic friction between the wad and the desk?

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Answers (1)

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Mini Skirt · Answer 1

0.06

Explanation:

On a level surface, normal force = weight.

Sum of the forces in the x direction:

∑F = ma

Nμ = ma

mgμ = ma

gμ = a

μ = a/g

μ = (0.6 m/s²) / (9.8 m/s²)

μ = 0.06