On a frictionless, horizontal air table, puck A (with mass 0.150kg} ) is moving toward puck B (with mass 0.350kg} ), which is initially at rest. After the collision, puck A has a velocity of 0.120m/s to the left, and puck B has a velocity of 0.650m/s to the right.
Part A
What was the speed of puck A before the collision?
v =___________m/s}
Part B
Calculate the change in the total kinetic energy of the system that occurs during the collision.
\Delta K =___________ J}