A railroad car with a mass of 1.98 ✕ 104 kg moving at 2.92 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.54 m/s.
(a) What is the speed of the three joined cars after the collision?
2.00 m/s
(b) What is the decrease in kinetic energy during the collision?
I have answer it a and I need help finding b
1 answer
just add up the KE before and after the collision.
1 answer