A toy railroad car having a mass of 4 kg initially moving with a speed of 3 m/s collides and locks to another toy railroad car which is initially at rest. The two cars move off together with a speed of 1 m/s after the collision. What is the mass of the toy car that was initially at rest?
48.A toy railroad car having a mass of 4 kg initially moving with a speed of 3 m/s collides and locks to another toy railroad car which is initially at rest. The two cars move off together with a speed of 1 m/s after the collision. What is the mass of the toy car that was initially at rest? (the answer is 8kg) but how???
48.A toy railroad car having a mass of 4 kg initially moving with a speed of 3 m/s collides and locks to another toy railroad car which is initially at rest. The two cars move off together with a speed of 1 m/s after the collision. What is the mass of the toy car that was initially at rest? (the answer is 8kg) but how???