1) Consider a frictionless ramp on which a smooth object is made to slide down from an initial height h. The distance d necessary to stop the object on a flat track (of coefficient of friction $\mu$ ), kept at the ramp end is A) $h/ \mu$ B) $\mu h$ C) $\mu^{2} h$ D) $h^{2} \mu$ Answer: Option AExplanation:From the conservation of energy $mgh= \mu mg d$ $d= \frac{h}{\mu}$
