Answers

2014-01-02T02:01:56+01:00
Work done=fxsxcos(degree)
F=mass x acceleration due to gravity
  =2        X10
 =20N
S=4m
Cos(degree)=cos(30)
                      =0.8660
W=20x4x0.8660
  =69.28
  =69J
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