53; m =I.r = = Mass M moves to the right with speed =y along a frictionless horizontal surface and crashes into an equal mass M initially at rest. Upon colliding, the two masses stick together and move with speed '5! to the right. Notice that y and '9' denote different speeds. After the collision the magnitude of the kinetic energy of the system is: [pick all correct answers] |:J Lemme |:J 1i'2My'Q [3 \"new: |:J mwe