MCQ
When an object is accelerated:
- AIts direction must be constant
- BIts velocity is necessarily changing
- CIts velocity is constant
- DIts speed is necessarily changing
Explanation:
Acceleration is the time rate of change of velocity.
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$(A)$ For the same $F$, the value of $a$ does not depend on whether the cylinder is solid or hollow
$(B)$ For a solid cylinder, the maximum possible value of $a$ is $2 \mu g$
$(C)$ The magnitude of the frictional force on the object due to the ground is always $\mu m g$
$(D)$ For a thin-walled hollow cylinder, $a=\frac{F}{2 m}$
