Physics · Rotational Dynamics
NEET (UG) 2023 — Question 20
The angular acceleration of a body, moving along the circumference of a circle, is :
- Option A:
along the radius towards the centre
- Option B:
along the tangent to its position
- Option C:Correct
along the axis of rotation
- Option D:
along the radius, away from centre
Answer: C
Step-by-step solution
Angular acceleration is a vector quantity. For a rigid body rotating about a fixed axis, the angular acceleration vector is parallel to the axis of rotation, perpendicular to the plane of motion. Even for a particle moving along the circumference of a circle, the angular acceleration (if non-zero) points along the axis of rotation (perpendicular to the plane). Thus, the correct option is C.
Answer key and solution verified before publishing.
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- Exam
- NEET (UG) 2023
- Paper
- 2023 paper
- Subject
- Physics
- Chapter
- Rotational Dynamics
- Topic
- Kinematics of General Motion of a Rigid Body