A 3.00-kg block is placed at the top of a track consisting of two frictionless quarter circles of radius R equal to 1.68 m connected by a 7.00-m-long, straight, horizontal surface (see the figure below). The coefficient of kinetic friction between the block and the horizontal surface is ?k?k equal to 0.100. The block is released from rest.

1) Find where the block stops, as measured from the left end of the horizontal surface, marked x = 0 on the figure.?

x = 0 R