A batter bunts a pitched baseball, blocking the ball withoutswinging. (a) Can the baseball deliver more kinetic energy tothe bat and batter than the ball carries initially? (b) Can thebaseball deliver more momentum to the bat and batter thanthe ball carries initially? Explain each of your answers.

A 10-g bullet moving horizontally with a speed of 1.8 km/s strikes and passes through a 5.0-kg block initially at rest on a horizontal frictionless surface. The bullet emerges from the block with a speed of 1.0 km/s. What is the kinetic energy of the block immediately after the bullet emerges? 6.4 J 10 J 5.3 J 8.0 J 09.4J

A railroad car of mass 3.00 ✕ 104 kg moving at 5.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 1.20 m/s. (a) What is the speed of the three coupled cars after the collision? m/s(b) How much kinetic energy is lost in the collision? J

8.22 •• When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. In one such accident, a 1750-kg car traveling to the right at 1.50 m/s collides with a 1450-kg car going to the left at 1.10 m/s. Measurements show that the heavier car's speed just after the collision was 0.250 m/s in its original direction. You can ignore any road friction during the collision. (a) What was the speed of the lighter car just after the collision? (b) Calculate the change in the combined kinetic energy of the two-car system dur- ing this collision.