Answer Happy

m₁ A train car with mass m₁ = 607 kg is moving to the right with a speed of v₁ = 7.6 m/s and collides with a second train car. The two cars latch together during the collision and then move off to the right at v₁ = 4.6 m/s. 1) What is the initial momentum of the first train car? 4613.2 Your submissions: 4613.2 Computed value: 4613.2 Feedback: Correct! 395.869 m2 2) What is the mass of the second train car? Your submissions: 395.869 Computed value: 395.869 Feedback: Correct! kg-m/s Submit Submitted: Wednesday, July 6 at 3:57 PM kg Submit Submitted: Wednesday, July 6 at 3:58 PM
3) What is the change in kinetic energy of the two train system during the collision? 6919.805 4) Your submissions: 6919.805 X Computed value: 6919.805 Feedback: Watch your sign the system loses energy during the collision. m₁ J Submit Submitted: Wednesday, July 6 at 4:03 PM P1 initial P1 final P1 initial P1 final P1 initial P1 final Submit Now the same two cars are involved in a second collision. The first car is again moving to the right with a speed of v₁ = 7.6 m/s and collides with the second train car that is now moving to the left with a velocity v₂ = -6 m/s before the collision. The two cars latch together at impact. m₂ What is the final velocity of the two-car system? (A positive velocity means the two train cars move to the right - a negative velocity means the two train cars move to the left.) m/s Submit 5) Compare the magnitude of the momentum of train car 1 before and after the collision: +