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100 joule of work was done to shift a body by 10 meter using a force of 20N .Find the angle of its application with the horizontal.




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W= Fs cosФ
⇒100 = 20*10* cosФ
⇒100 = 200 cosФ
⇒ cos Ф = 100/200 = 0.5
⇒ Ф = arc.cos(0.5) = 45 degree

The force was applied at an angle of 45 degree.
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