conservation of momentum applies
Momentum before= momentum after
M*2.86+2M*1.40=3M*V
find V
A railroad car with a mass of 1.91 multiplied by 104 kg moving at 2.86 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 1.40 m/s.
What is the speed of the three joined cars after the collision?
What is the decrease in kinetic energy during the collision?
2 answers
How do you find the "decrease in kinetic energy during the collision?"