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Question

A force of 50N acting on a body at an angle θ with the horizontal. If 150J of work is done by displacing it through 6m, then θ is:

A
60o
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B
30o
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C
0o
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D
45o
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Solution

The correct option is A 60o
Horizontal component of force =Fcosθ
Work done = (Fcosθ)×6
150=50×cosθ×6
cosθ=12
θ=60o

979716_1074649_ans_410aae8ea34e4218a7467f62cf812489.PNG

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