Work done by variable force is determine by dividing____________________?
Correct answer: B. displacement into small interval
- A. force into small interval
- B. displacement into small interval
- C. both force and displacement into small intervals
- D. force into small and displacement into large intervals
Explanation
For a variable force, the displacement is divided into small intervals and the work over each interval is approximated by F Δs, then these small contributions are added. This is the idea behind W = ∫F ds. The likely wrong choice is c because the force is evaluated over each small displacement interval rather than dividing both quantities independently.
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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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