1.

A box is dragged along a horizontal floor by a rope which makes an angle of 60° with the horizontal. How much work is done if the tension in the rope is 150 N and the box is dragged through a distance of 10 m.

Answer»

750 J
1500 J
`750sqrt3 J`
NONE of these

Solution :WORK done W=F s cos `theta`
=`150xx10xxcos60^(@)=1500xx1/2=750J`.


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