A body moves a distance of 10 m along a straight line under the action of a force of 5 newtons. If the work done is 25 joules, the angle which the force takes with the direction of motion of the body is
Correct answer: B. 30
- A. 0
- B. 30
- C. 60
- D. 90
Explanation
Correct. The work done is given by \( W = F \cdot d \cdot \cos(\theta) \), where \( \theta \) is the angle between the force and the direction of motion. In summary, the correct option is **b. 30°** for the angle between the force and the direction of motion.
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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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