Answers

2015-12-12T20:01:21+05:30
W = F.scos(x) (s=displacement). At perpendicular (x=pi/2), cos(x) = 0........ So, no work is done.....
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2015-12-15T21:33:56+05:30
Since
work done=force × direction × cos(x)
=F×s×cos(90)
=0
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