Work-energy Theorem
A particle of mass 0.5 kg starts from rest and acquires a velocity of 10 m/s under the action of a constant force. The work done by the force is:
Select the correct option:
Solution
25 J
- Application of Principle: The work done is equal to the final kinetic energy since the particle starts from rest.
- Kinetic Energy Formula: K=21mv2.
- Identify Variables:
- Mass m=0.5 kg.
- Velocity v=10 m/s.
- Calculation:
- W=21×0.5×102=0.25×100.
- Result: W=25 Joules.
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About This Question
- Subject
- physics
- Chapter
- work, energy and power
- Topic
- work-energy theorem
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
25 J
- Application of Principle: The work done is equal to the final kinetic energy since the particle starts from rest.
- Kinetic Energy Formula: K=21mv2.
- Identify Variables:
- Mass m=0.5 kg.
- Velocity v=10 m/s.
- Calculation:
- W=21×0.5×102=0.25×100.
- Result: W=25 Joules.
This easy difficulty physics question is from the chapter work, energy and power, covering the topic of work-energy theorem. It appeared in the 2025 exam.
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