Posted by Sarah on .
Suppose the roller coaster in Fig. 641 (h1 = 34 m, h2 = 10 m, h3 = 30) passes point 1 with a speed of 1.60 m/s. If the average force of friction is equal to one fourth of its weight, with what speed will it reach point 2? The distance traveled is 60.0 m.

physics 
bobpursley,
without the figure...