A) speed and time of descent will be same
B) speed will be same, but time of descent will be different
C) speed will be different, but time of descent will be same
D) speed and time of descent both are different
Correct Answer: B
Solution :
In pure rolling, mechanical energy remains conserved. Therefore, when heights of inclines are equal, speed of sphere will be same in both die cases. But as acceleration down the plane, \[\alpha \propto \sin \theta \] therefore, acceleration and time of descent will be different.
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