Worksheet 2: Quantitative Conservation Of Momentum
Impulsive Force Model Worksheet 2: Quantitative Conservation of Momentum
Name: ______________________________________
1. Kim holds a 2.0 kg air rifle loosely and fires a bullet of mass 1.0 g. The muzzle velocity of the bullet is 150 m/s. Find the recoil speed of the gun.
Momentum conservation equation:
Recoil speed =________________
2. If the girl in the previous question holds the gun tightly against her body, the recoil speed is less. Calculate the new recoil speed for the 48 kg girl.
Momentum conservation equation:
Recoil speed - _______________
3. In a freight yard a train is being put together from freight cars. An empty freight car, coasting at 10 m/s, strikes a loaded car that is stationary, and the cars couple together. …show more content…
Mighty Miguel has a mass of 100. kg and is running towards the end zone at 9.0 m/s. Joey Gonzales (mass of 75.0 kg), runs at 12.0 m/s towards Miguel. They collide at the 2-yard line. Does Miguel score?
Momentum conservation equation:
What is Miguel’s velocity after the hit? ______________
10. A ball of mass 3.0 kg, moving at 2 m/s eastward, strikes head-on a ball of mass 1.0 kg that is moving at 2 m/s westward. The balls stick together after the impact. What is the magnitude and direction of the velocity of the combined mass after the collision? ______
11. A way of measuring the muzzle velocity of a bullet is to fire it horizontally into a massive block of wood placed on a cart. Assuming no friction, we then measure the velocity with which the wood containing the bullet and cart begin to move. Bullet has mass of 50 grams and Cart+Block has mass of 20 kg. After the shot, the cart, wood, and bullet moved at a constant speed, traveling 8.0 m in 4.0 s. From these data, determine the original speed of the bullet. ___________
12. A raft of mass 180 kg carries two swimmers of mass 50. kg and 80. kg. The raft is initially floating at rest. The two swimmers simultaneously dive off opposite ends of the raft, each with a horizontal velocity of 3 m/s. Determine the final velocity and direction the raft.
Name: ______________________________________
1. Kim holds a 2.0 kg air rifle loosely and fires a bullet of mass 1.0 g. The muzzle velocity of the bullet is 150 m/s. Find the recoil speed of the gun.
Momentum conservation equation:
Recoil speed =________________
2. If the girl in the previous question holds the gun tightly against her body, the recoil speed is less. Calculate the new recoil speed for the 48 kg girl.
Momentum conservation equation:
Recoil speed - _______________
3. In a freight yard a train is being put together from freight cars. An empty freight car, coasting at 10 m/s, strikes a loaded car that is stationary, and the cars couple together. …show more content…
Mighty Miguel has a mass of 100. kg and is running towards the end zone at 9.0 m/s. Joey Gonzales (mass of 75.0 kg), runs at 12.0 m/s towards Miguel. They collide at the 2-yard line. Does Miguel score?
Momentum conservation equation:
What is Miguel’s velocity after the hit? ______________
10. A ball of mass 3.0 kg, moving at 2 m/s eastward, strikes head-on a ball of mass 1.0 kg that is moving at 2 m/s westward. The balls stick together after the impact. What is the magnitude and direction of the velocity of the combined mass after the collision? ______
11. A way of measuring the muzzle velocity of a bullet is to fire it horizontally into a massive block of wood placed on a cart. Assuming no friction, we then measure the velocity with which the wood containing the bullet and cart begin to move. Bullet has mass of 50 grams and Cart+Block has mass of 20 kg. After the shot, the cart, wood, and bullet moved at a constant speed, traveling 8.0 m in 4.0 s. From these data, determine the original speed of the bullet. ___________
12. A raft of mass 180 kg carries two swimmers of mass 50. kg and 80. kg. The raft is initially floating at rest. The two swimmers simultaneously dive off opposite ends of the raft, each with a horizontal velocity of 3 m/s. Determine the final velocity and direction the raft.