...railroad car of equal mass.? A railroad car with a mass of 4.5 X 10^5 kg collides with a stationary railroad car of equal mass. After the collision, the two cars lock together and move off at 4.5 m/s.
(a) Before the collision, the first railroad car was moving at 9.0 m/s. What was its momentum?
4.05E6 kg·m/s
(b) What was the total momentum of the two cars after the collision?
4.05E6 kg·m/s
(c) What were the kinetic energies of the two cars before and after the collision?
___ J (before the collision)
___ J (after the collision)
i got a and b, but i've tried to get c and its just hard. can someone tell me how to do it? it would be greatly appreciated!
(a) Before the collision, the first railroad car was moving at 9.0 m/s. What was its momentum?
4.05E6 kg·m/s
(b) What was the total momentum of the two cars after the collision?
4.05E6 kg·m/s
(c) What were the kinetic energies of the two cars before and after the collision?
___ J (before the collision)
___ J (after the collision)
i got a and b, but i've tried to get c and its just hard. can someone tell me how to do it? it would be greatly appreciated!