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8 January, 04:00

A piano has a mass of 185 kg, and the coefficient of friction between it and the floor is 0.39. What is the maximum force of friction between the piano and the floor?

707 N

523 N

1813 N

1208 N

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  1. 8 January, 04:20
    0
    The mass of the piano is 185 kg, therefore its weight is

    W = (185 kg) * (9.8 m/s²) = 1813 N

    The normal reaction force on the piano from the floor is N = 1813 N, according to Newton's 3rd Law.

    The coefficient of friction between the piano and the floor is given as μ = 0.39.

    By definition, the frictional force is

    F = μN

    = 0.39*1813

    = 707.07 N

    Answer: 707 N
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