1. Car X is a 2600-kg car traveling at 35 m/s. It collides with Car Y, a 1450-kg car moving 12 m/s in the same direction. The two cars stick together upon colliding. What is the new speed of these cars? 2. A 42.0-g bullet leaves a rifle and embeds itself in a 2.96-kg stationary block of wood. The wood-bullet combination flies away with a velocity of 4.9 m/s. What was the initial velocity of the bullet in m/s?

3. Ball A is 0.40 kg and it collides with Ball B of mass 0.60 kg. Ball A initially moves to the right with a velocity of 1.0 m/s while Ball B moves to the left at 2.0 m/s (or -2.0 m/s). After the collision, Ball A moves to the left at 2.60 m/s. What is the velocity of Ball B in m/s?