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13 September, 02:34

A person is pulled to the right on a sled (total mass of 52.9 kg) across the surface of a frozen pond with a force of 67.7 Newtons so that they move with a constant velocity. What is the force of friction acting on the sled?

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  1. 13 September, 05:05
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    67.7 N

    Explanation:

    Draw a free body diagram of the person on the sled. There are four forces:

    67.7 N to the right,

    friction force to the left,

    weight force down,

    and normal force up.

    Constant velocity means 0 acceleration.

    Sum of the forces in the x direction:

    ∑F = ma

    67.7 N - F = 0

    F = 67.7 N
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