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9 November, 05:41

A 200 kg crate is pulled along a level surface by an engine. the coefficient of friction between crate and surface is 0.4.

a. how much power must the engine deliver to move the crate at 5.0m/s.

b. how much work is done by the engine in 180s

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  1. 9 November, 05:48
    0
    Normal force = 200 (9.81) = 1962 N

    Friction force = 1962 *.4 = 784.8

    power = force * distance / time = 784.8 * 5 = 3924 Watts

    Watts = Joules / sec

    3924 x 180 = 706,320 Joules
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Home » Physics » A 200 kg crate is pulled along a level surface by an engine. the coefficient of friction between crate and surface is 0.4. a. how much power must the engine deliver to move the crate at 5.0m/s. b. how much work is done by the engine in 180s
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