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.
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More circular motion Practice Questions
A small stone tied to a string is whirled in a vertical circle of radius 2 m. What is the minimum sp...
A small stone tied to a string is whirled in a vertical circle of radius 2 m. What is the minimum sp...
An electron travels in a circular path of radius r inside a uniform magnetic field; if its speed i...
An electron travels in a circular path of radius r inside a uniform magnetic field; if its speed i...
A bucket of water is whirled in a vertical circle of radius 0.9 m, and at the highest point the wate...
A bucket of water is whirled in a vertical circle of radius 0.9 m, and at the highest point the wate...
A stone of mass 0.5 kg is whirled in a horizontal circle of radius 1 m at a constant speed of 4 m/s ...
A stone of mass 0.5 kg is whirled in a horizontal circle of radius 1 m at a constant speed of 4 m/s ...
A small bead is whirled in a vertical circle of radius 2.5 m at the end of a string. What is the min...
A small bead is whirled in a vertical circle of radius 2.5 m at the end of a string. What is the min...
A bucket of water is swung in a vertical circle of radius 1.6 m so that the water does not spill eve...
A bucket of water is swung in a vertical circle of radius 1.6 m so that the water does not spill eve...
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.
Looking for more practice? Explore all physics questions or browse kinematics questions on RankGuru.