Blocks sliding 1 A block with mass m = 17.0 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4304.0 N/m after being compressed a distance x1 = 0.576 m from the spring’s unstretched length. The floor is frictionless except for a rough patch a distance d = 2.4 m long. For this rough path, the coefficient of friction is ?k = 0.46. The work done by the spring as it accelerates the block is 713.98 j and the speed of the block right after it leaves the spring is 9.16 m/s 3) How much work is done by friction as the block crosses the rough (spot in J) and what is the speed of the block after it passes the rough spot in m/s