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physical

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How much more work is done to push a box 2.5 m with a force of 30 N than to push a box 2.0 m with a force of 26 N?

  • physical -

    W =F•s•cosα
    α=0, cosα =1.
    W1-W2 =F1•s1 – F2•s2=30•2.5 - 26•2=
    = 75 -52 = 23 J.

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