Posted by Anonymous on .
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?
α=0, cosα =1.
W1-W2 =F1•s1 – F2•s2=30•2.5 - 26•2=
= 75 -52 = 23 J.