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11 January, 05:54

A Mars rover has a mass of 500 kg. The acceleration due to gravity in mars is about 3.7 m/s^2 and the coefficient of kinetic friction for the rover on the surface is 0.4. How much force must the rover's engine exert in order to travel at a constant speed?

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  1. 11 January, 06:12
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    740 N

    Explanation:

    Friction equals normal force times coefficient of friction. On level ground, normal force equals weight.

    Constant speed means no acceleration. Sum of the forces:

    ∑F = ma

    F - mgμ = 0

    F = mgμ

    F = (500 kg) (3.7 m/s²) (0.4)

    F = 740 N
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