Question

A solid sphere is made to roll down two inclined planes with same height but different lengths then:

• A. the time of descent and the speed at the bottom will be same in both cases
• B. time of descent will be different, but the speed at the bottom will be same in both cases
• C. the time of descent will be same, but the speed at the bottom of the plane will be greater for the longer plane
• D. the time of descent will be same, but the speed at the bottom of the plane will be smaller for the longer plane

Answer 1

The correct option is B

time of descent will be different, but the speed at the bottom will be same in both cases

Since the height is the same, the speed at the bottom will be the same. Therefore, the correct option is (d).