A) \[\ge \sqrt{\frac{10}{7}gh}\]
B) \[\ge \sqrt{2gh}\]
C) \[\sqrt{2gha}\]
D) \[\frac{10}{7}gh\]
Correct Answer: C
Solution :
As the body is moving on a frictionless surface, its mechanical energy is conserved. When the body climbs up the inclined plane, it keeps on rotating with same angular speed, as no frictional force is present to provide retarding torque, so Hence, the correction option is [c].
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