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posted by Anonymous on Saturday, April 28, 2012 at 9:40pm.
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?
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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