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A box is dragged across a surface by a r...

A box is dragged across a surface by a rope which makes an angle `45^(@)` with the horizontal. The tension in the rope is 100 N when the box is dragged 10 m . The work done is

A

(a) 707.1J

B

(b) 607.1 J

C

(c) 141.2J

D

(d) 900J

Text Solution

Verified by Experts

The correct Answer is:
A
The component of force acting along the surface is `t cos theta`
`"Work done" =T cos theta xx x`
`=100cos 45^(@)xx10=707.1 J`
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