MCQ
Doppler effect is applicable for
- AMoving bodies
- BOne is moving and other are stationary
- ✓For relative motion
- DNone of these
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$(i)$ The ball takes twice as much time to roll from $Q$ to $O$ as it does to roll from $P$ to $O$.
$(ii)$ The acceleration of the ball at $Q$ is twice as large as the acceleration at $P$.
$(iii)$ The ball has twice as much $K.E$. at $O$ when rolling from $Q$ as it does when rolling from $P$.
