Q7.18     A solid sphere rolls down two different inclined planes of the same heights but
              different angles of inclination.

              (c) If so, which one and why?

Answers (1)

The equation of motion gives :

                                             v\ =\ u\ +\ at

So                                            t \propto \frac{1}{a}

Since we know that   a_2 > a_1

So        t_2 < t_1

Hence the inclined plane having a smaller angle of inclination will take more time. 

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