A lawn roller is pushed across a lawn by a force of 103 N along the direction of the handle, which is 22.5° above the horizontal. If 63.0 W of power is developed for 90.0 s, what distance is the roller pushed?

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  1. P = 63.0 Watts = 63.0 J/s.

    P = 103*cos22.5 * d/90 = 63 Watts/s
    103*cos22.5 * d/90 = 63
    103*cos22.5 * d = 63*90 = 5670
    d = 5670/103*cos22.5 = 51 m.

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