Instantaneous Power
A force F = 3î + 4ĵ N acts on a particle moving with velocity v = 2î + 3ĵ m/s. What is the instantaneous power?
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About This Question
- Subject
- physics
- Chapter
- work, energy and power
- Topic
- instantaneous power
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
18 W
- Instantaneous Power Formula: P=F⋅v (Dot product of force and velocity vectors).
- Vector Inputs:
- F=(3,4) in N.
- v=(2,3) in m/s.
- Dot Product Calculation:
- P=(3×2)+(4×3).
- P=6+12.
- Result: Power output at this instant is 18 Watts.
This medium difficulty physics question is from the chapter work, energy and power, covering the topic of instantaneous power. It appeared in the 2025 exam.
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