MCQ
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
- ✓707.1 J
- B607.1 J
- C1414.2 J
- D900 J
✓
Answer
Correct option: A.
707.1 J
707.1 J The component of force acting along the surface is T cos θ
∴ Work done = T cos θ × x
= 10o cos 45° × 10
= 707.1 J
∴ Work done = T cos θ × x
= 10o cos 45° × 10
= 707.1 J
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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