A 10,291-kg railroad car traveling at a speed of 35 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed just afterward?

A railroad car of mass M moving at a speed v_1 collides and couples with two coupled railroad cars, each of the same mass M and moving in the same direction at a speed v_2. (a) What is the speed v_f of the three coupled cars after the collision in terms of v_1 and v_2? (b) How much kinetic energy is lost in the collision? Answer in terms of M, v_1, andv_2 .

A body with mass of 5 kg is moving at a speed of 2 m/s and collides inelastically with another body with mass of 3 kg that stayed at rest before the collision. What speed will the bodies have after the collision?

A billiard ball rolling across a table at 1.70 m/s makes a head-on elastic collision with an identical ball. Find the speed of each ball after the collision when each of the following occurs. (a) The second ball is initially at rest. first ball     m/s second ball     m/s (b) The second ball is moving toward the first at a speed of 1.15 m/s. first ball     m/s second ball     m/s (c) The second ball is moving away from the first at a speed of 0.95 m/s. first ball     m/s second ball     m/s