physics

a) What is the minimum work needed to push a 900 kg car 410 m up a 17.5° incline with zero friction?

If i know this answer is 1.08e6 what equation should i use for the next part because the one i used was wrong

(b) What is the minimum work needed if the effective coefficient of friction is 0.40?

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  1. (b) W = M g H + friction work
    = M g X sin17.5 + M g X cos 17.5 * 0.4

    X = 410 m

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    posted by drwls

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