Two forces of F1 = 5 N and F2 = 15 N are working on a body in opposite directions. If the body is displaced by 5 m in the direction of net force, what will be the work done by F2?
Correct answer: C. 75 J
- A. 25 J
- B. -75 J
- C. 75 J
- D. 50 J
Explanation
Given that; F1 = 5 N. F2 = 15 N. Displacement = 5 m. The work done by that force is the Force x Displacement in the direction of the force. Since the question asks for work done by F2. W = F2 x d. W = 15 x 5. W = "75 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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