A horizontal force of 150 N is used to push a 40.0-kg packing crate a distance of 6.00 m on a rough horizontal surface. If the crate moves a

Question

A horizontal force of 150 N is used to push a 40.0-kg packing crate a distance of 6.00 m on a rough horizontal surface. If the crate moves at constant speed, find (a) the work done by the 150-N force and (b) the coefficient of kinetic friction between the crate and surface.

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Thanh Thu 5 months 2021-08-26T12:43:55+00:00 1 Answers 52 views 0

Answers ( )

  1. lethu
    0
    2021-08-26T12:45:37+00:00
    Reply

    Answer:

    a. 900 J

    b. 0.383

    Explanation:

    According to the question, the given data is as follows

    Horizontal force = 150 N

    Packing crate = 40.0 kg

    Distance = 6.00 m

    Based on the above information

    a. The work done by the 150-N force is

    W = F x = \mu N x = \mu\ m\ g\ x

    W = 150 \times 6

    = 900 J

    b. Now the coefficient of kinetic friction between the crate and surface is

    \mu = \frac {F}{m\timesg}

    = \frac{150}{40\times 9.8}

    = .383

    We simply applied the above formulas so that each one part could calculate

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