University:
Jackson College
Course:
PHY 231 | College Physics I
Academic year:

2023
Views:

135

Pages:

6
Author:

boarderbabe73z1qz

Momentum Worksheet #1 (name) 1. What is the momentum of a golf ball that has a mass of 60 g and is moving with a velocity of 70/ 2. If, in problem #1, the impact between the club and the ball lasted 2.0x10s, what force did the club apply? 3. A girl holds a 2.0 kg rifle loosely and fires a bullet of mass 1.0 g. The muzzle velocity of the bullet is 150 / What is the recoil velocity of the gun? 4. If the girl in problem #3 holds the gun tightly against her shoulder, the recoil velocity is less. Calculate the new recoil velocity if the girl's mass is 48 kg. 5. In a freight yard a train is being made up. An empty car, coasting at 10"/ strikes a stationary loaded car and they couple together. Each of the cars has a mass of 3000 kg when empty, and the loaded car contains 12,000 kg of bottled pop. With what speed do the coupled cars move? V= 6. A space man of mass 80 kg carries an empty oxygen tank of mass 10 kg. He throws the tank away from himself with a speed of 2.0"/ With what velocity does the spaceman start to move through space? V= 7. What force, acting for 0.0010 s, will change the velocity of a 100 g baseball from 30/, EAST to 40 / WEST? F= 8. A ball of mass 3.0 kg, moving at 2.0/, east, strikes head-on a ball of mass 1.0 kg that is moving at 2.0"/, west. The balls stick together after the impact. What is the velocity of the combined mass after the impact? VF= 9. A life raft of mass 180 kg carries two swimmers of mass 50 kg and 80 kg respectively. The raft is initially at rest, then the swimmers simultaneously dive off opposite ends of the raft each with a horizontal velocity of 3.0 "/ With what velocity does the raft move? 2.2.1x10°N 3. -0.075 / 4. -0.0030 / 5.1.7"/ Answers: 1.4.2/ 6.-0.25% 7.7.0x10°N 8.1.0/ [E] 9. 0.50, toward 50 kg swimmer Momentum Worksheet#2 (name) 1. A body of mass 5.0 kg travelling at a speed of 13 * m/s in a certain direction has its speed reduced to 5.0"/, in the same direction in a time interval of 2.5 s. What is the average decelerating force acting on the body? F av z 2. An airplane of mass 52,000 kg accelerates uniformly along a runway and takes off at a speed of 72"/ after a run lasting 56 s. What is the thrust exerted by the engines and how far does the plane travel during takeoff? F = d= 3. A tennis ball of mass 55 g strikes a racket at a speed of 7 =/ 5 1 after the collision it travels at a speed of 8 * n/2 the opposite direction. If the collision lasts for approximately 0.12 s, what is the average force exerted by the racket on the ball? F 4. A rifle bullet of mass 64 g leaves the muzzle with a speed of 550 / If the rifle itself has a mass of 7.5 kg, what is the speed at which the rifle recoils? V