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9 April, 23:48

A 76.5 kg cross-country skier skiing on unwaxed skis along dry snow at a constant speed of 4.00 m/s experiences a force of friction of - 60.0 N. What is the coefficient of friction between unwaxed skis and dry snow?

a. 0.08

b. 0.78

c. 1.28

d. 12.5

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Answers (1)
  1. 10 April, 00:02
    0
    The force of friction = (weight) x (coefficient of friction)

    Skier's weight = (mass) x (gravity) = (76.5) x (9.8) = 749.7 N

    Force of friction = (749.7) x (coefficient of friction) = 60.0 N

    Coefficient of friction = 60 / 749.7 = 0.08 (rounded)

    Choice-'A' is the closest choice offered.
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