Work By Variable Force
Hardphysics
Work done by F(x)=4x (N) moving from x=0 to x=3 m is:
Select the correct option:
Solution
Incorrect! Answer:
18 J
When the force is variable, we must integrate: W=∫xixfF(x)dx W=∫034xdx W=[2x2]03=2(32)−2(02)=18 Joules.
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About This Question
- Subject
- physics
- Chapter
- work, energy and power
- Topic
- work by variable force
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
18 J
When the force is variable, we must integrate: W=∫xixfF(x)dx W=∫034xdx W=[2x2]03=2(32)−2(02)=18 Joules.
This hard difficulty physics question is from the chapter work, energy and power, covering the topic of work by variable force. It appeared in the 2025 exam.
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