Boxcar 1 of mass m1 = 4 × 103 kg is moving down the railroad track with speed v1i = 4 m/s. It collides and couples to boxcar 2, which is initially at rest. Together they move down the track at vf = 2.8 m/s.
1) What is the momentum of boxcar 1 before colliding with boxcar 2?
p 1i = 16000 kgm/s
2) What is the mass of boxcar 2?
m 2 =
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together after the collision.
What is the change ΔK=Kfinal−Kinitial in the two-block system's
kinetic energy due to the collision?
Express your answer numerically in joules.
Before collision: m2 After collision:
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