Work done will be maximum if the angle between the force F and displacement d is:
Correct answer: D. 0 degree
- A. 45°
- B. 90°
- C. 180°
- D. 0 degree
Explanation
(a) Incorrect. While 45° provides a decent amount of work, it's not the maximum.(b) Incorrect. When the angle is 90°, the force is completely perpendicular to the displacement, resulting in no work done.(c) Incorrect. Similar to 90°, a 180° angle leads to zero work as the force directly opposes the displacement.(d) Correct! When the angle between F and d is 0°, the force is completely aligned with the displacement, maximizing the work done (W = Fd cos θ, where θ = 0°).
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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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