A small china bowl having kinetic energy E is sliding along a frictionless countertop when a server, with perfect timing, places a rice ball into the bowl as it passes him. If the bowl and rice ball have the same mass, what is the kinetic energy of the system thereafter? (a) 2E (b) E (c) E/2 (d) E/4 (e) E/8

Chapter 10 Notes- Momentum The momentum of an object is the product of its mass and velocity. Momentum moves in the same direction as a particles velocity. The dimension for momentum is a kg*m/s. The formula for momentum is: p=mv The center of mass is shown by the formula: x =( m2 )x CM m1+m 2 2 For center of mass multiply the associated mass with the associated x coordinate. With momentum the initial momentum is going to be the same as the final momentum, and we know that for every action the is an equal and opposite reaction so for problems that ask for the recoil momentum, we use the following: m v =m v