A 250 G Sticky Hockey Puck Slides Along a Frictionless

Multiple Choice

A 250 g sticky hockey puck slides along a frictionless, horizontal ice surface at 75 m/s in the +x direction. It collides with a 500 g sticky puck originally sliding at 25 m/s in the -y direction. They collide perfectly inelastically. How much kinetic energy is lost in this collision?

A) 521 J
B) 779 J
C) 520 J
D) More information is needed