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Question: Answered & Verified by Expert
Choose the correct alternatives.
PhysicsSystem of Particles and Rotational Motion
Options:
  • A
    For a general rotational motion, angular momentum $L$ and angular velocity $\omega$ need not be parallel.
  • B
    For a rotational motion about a fixed axis, angular momentum $L$ and angular velocity $\omega$ are always parallel.
  • C
    For a general translational motion, momentum $p$ and velocity $v$ are always parallel.
  • D
    For a general translational motion, acceleration $a$ and velocity $v$ are always parallel.
Solution:
1481 Upvotes Verified Answer
The correct answers are:
For a general rotational motion, angular momentum $L$ and angular velocity $\omega$ need not be parallel.
,
For a general translational motion, momentum $p$ and velocity $v$ are always parallel.
For a general rotational motion, where axis of rotation is not symmetric. Angular momentum $L$ and angular velocity $(\omega)$ not be parallel.
For a general translational motion momentum $\vec{p}=m \vec{v}$, hence, $\vec{p}$ and $\vec{v}$ are always parallel and always in same direction.

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