A block of mass m = 2.2 kg, moving on a frictionless surface with aspeed of initial velocity = 6.3m/s, makes a perfectly elasticcollision with a block of mass M at rest. After the collision, the2.2 block recoils with a speed of final velocity = 1.2 m/s. In fig.8.1, the blocks are in contact for 0.20 s. The average force on the2.2 kg, while the two blocks are in contact, is closest to: A) 83 N B) 69 N C) 56 N D) 76 N E) 13 N
