Block 1, of mass m1 = 4.90 kilogram, moves along a frictionless air track with speed v1 = 27.0 m/s. It collides with block 2, of mass m2 = 53.0 kilogram, which was initially at rest. The blocks stick together after the collision.
a) Find the magnitude pi of the total initial momentum of the two-block system.
b) Find vf, the magnitude of the final velocity of the two-block system.
c) Determine the change ΔK = Kfinal -Kinitail in the system kinetic energy due to the collision?