an object of mass m is at rest at the top of a smooth slope of height h and length l. the coefficient of kinetic friction between the object and the surface, ? k, is small enough that the object will slide down the slope if given a very small push to get it started.
1. find an expression for the object's speed at the bottom of the slope.
2. sam, whose mass is 70kg , stands at the top of a 10-m-high, 80-m-long snow-covered slope. his skis have a coefficient of kinetic friction on snow of 0.07. if he uses his poles to get started, then glides down, what is his speed at the bottom?