In an exciting game, a baseball player manages to safely slide into second base, The mass of the baseball player is 78.5 kg and the coefficient of kinetic friction between the ground and the player is 0.51. (a) Find the magnitude of the frictional force in newtons. :]N (b) It takes the player 1.6 s to come to rest. What was his initial velocity (in m/s)? E m Supporting Materials 7 Physical Constants [2 Points] OSCOLPHYS1 5.P.025.WA. MY NOTES A block of mass m1 = 40 kg on a horizontal surface is connected to a mass m2 = 21.5 kg that hangs vertically as shown in the figure below. The two blocks are connected by a string of negligible mass passing over a frictionless pulley. The coefficient of kinetic friction between m1 and the horizontal surface is 0.22. (a) What is the magnitude of the acceleration (in m/sz) of the hanging mass? :1 m/s2 (b) Determine the magnitude of the tension (in N) in the cord above the hanging mass. l:lN