When a spring is stretched, the work done by the stretching force is:
Correct answer: A. Positive
- A. Positive
- B. Negative
- C. Zero
- D. None of these options are correct
Explanation
Since the applied force in the spring and the expansion of the spring is in the same direction. So, the work done by the stretching force is positive. Work = F.d cosθ θ = 00 (cos 0o = 1) Work = F.d (positive). Hence, A is the correct option
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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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