Circular Motion
A particle moves in a circle of radius 2 m with a constant speed of 4 m/s. What is its centripetal acceleration?
Select the correct option:
Solution
8 m/s²
- Concept: In uniform circular motion, despite constant speed, acceleration exists because the direction of velocity changes.
- Centripetal acceleration (ac): ac=v2/r.
- Substitute Values:
- v=4 m/s.
- r=2 m.
- Calculation:
- ac=42/2=16/2=8 m/s2.
- Direction: This acceleration is always directed towards the center of the circle.
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About This Question
- Subject
- physics
- Chapter
- kinematics
- Topic
- circular motion
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
8 m/s²
- Concept: In uniform circular motion, despite constant speed, acceleration exists because the direction of velocity changes.
- Centripetal acceleration (ac): ac=v2/r.
- Substitute Values:
- v=4 m/s.
- r=2 m.
- Calculation:
- ac=42/2=16/2=8 m/s2.
- Direction: This acceleration is always directed towards the center of the circle.
This easy difficulty physics question is from the chapter kinematics, covering the topic of circular motion. It appeared in the 2025 exam.
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