Two equal masses are attached to the two ends of a spring of spring constant K. They are then pulled out symmetrically so that the spring extends by x. The work done by spring force on each block is:
Correct answer: D. Option D
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
Option D is correct as work done by the spring force = -1/2 kx² This work is done on both the blocks. Therefore, the work done on each block = -1/4 kx².
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About Work and Energy
Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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