A body moves a distance of 10 m along a straight line under the action of 5 N force. If work done is 25 J, then angle between the force and direction of motion of the body will be:
Correct answer: B. 60°
- A. 75°
- B. 60°
- C. 45°
- D. 35°
Explanation
W = fd cos θIf the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.Re arranging the formula given the formula for angle, Plug the values in and the answer will be 60 degree.As this is a numerical thus only one option is correct.
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About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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