A force of 20 N acts on a body through a distance of 10m. What must be the angle between force and displacement such that work comes out to be 100 J?
Correct answer: D. 60°
- A. 90°
- B. 0°
- C. 30°
- D. 60°
Explanation
Solution:- Use relation; W= Fd cosθ If θ is 60 degrees, cos(60°) = 1/2 = 0.5. In this case, the work done would be 20 N * 10 m * 0.5 = 100 J.
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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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