A body is displaced in a gravitational field as shown in the figure. The work done from A to C is:
Correct answer: C. Equal to the work done from A to C via B
- A. Greater than the work done from A to C via B
- B. Less than the work done from A to C via B
- C. Equal to the work done from A to C via B
- D. Double the work done from A to C via B
Explanation
Work done by gravity from A to C along two paths= Equal to the work done from A to C via B. Gravity is a conservative force,so work depends only on endpoints,not on the path.
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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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