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March 30, 2017

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You are pushing a refrigerator across the floor of your kitchen. You exert a horizontal force of 294 N for 7.6 s, during which time the refrigerator moves a distance of 3.2 m at constant velocity.

(a) What is the total work (by all forces) done on the refrigerator?
(b) What is the work done by friction?

  • physics - ,

    work=294*3.2
    friction=above work done, since there is no change in KE, or PE

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