### Physics Momentum and Impulse Problems**E7.** A 75-kg front-seat passenger in a car moving initially with a speed of 23 m/s (50 MPH) is brought to rest by an airbag in a time of 0.3 s. What is the impulse acting on the passenger?- [Answer box]**E8.** A ball traveling with an initial momentum of 1.7 kg·m/s bounces off a wall and comes back in the opposite direction with a momentum of -1.7 kg·m/s. What is the change in momentum of the ball?- [Answer box]**E9.** A ball traveling with an initial momentum of 5.1 kg·m/s bounces off a wall and comes back in the opposite direction with a momentum of -4.3 kg·m/s. What impulse is required to produce this change?- [Answer box]**E11.** An ice skater with a mass of 70 kg pushes off against a second skater with a mass of 30 kg. Both skaters are initially at rest.(a) What is the total momentum of the system after they push off?- [Answer box](b) If the larger skater moves off with a speed of 2.8 m/s, what is the corresponding speed of the smaller skater?- [Answer box]**E12.** A rifle with a mass of 3.4 kg fires a bullet with a mass of 7.8 g (0.0078 kg). The bullet moves with a muzzle velocity of 860 m/s after the rifle is fired.(a) What is the momentum of the bullet after the rifle is fired?- [Answer box](b) If external forces acting on the rifle can be ignored, what is the recoil velocity of the rifle?- [Answer box]**E13.** A rocket ship at rest in space gives a short blast of its engine, firing 60 kg of exhaust gas out the back end with an average velocity of 450 m/s. What is the change in momentum of the rocket during this blast?- [Answer box]**E14.** A railroad car with a mass of 13,000 kg collides and couples with a second car of mass 20,000 kg that is initially at rest. The first car is moving with a speed of 3.5 m/s prior

NOTE- Since you have asked multiple questions, we will solve the first three questions for you. To…

E7A 75-kg front-seat passenger in a car moving initially with a speed of 23 m/s (50 MPH) is brought to rest by an air bag in a time of 0.3 s. What is the impulse acting on the passenger? E8.A ball traveling with an initial momentum of 1.7 kg-m/s bounces off a wall and comes back in the opposite direction with a momentum of -1.7 kg-m/s. What is the change in momentum of the ball? E9.A ball traveling with an initial momentum of 5.1 kg-m/s bounces off a wall and comes back in the opposite direction with a momentum of -4.3 kg-m/s. What impulse is required to produce this change? E11.An ice skater with a mass of 70 kg pushes off against a second skater with a mass of 30 kg. Both skaters are initially at rest. (a) What is the total momentum of the system after they push off? (b) If the larger skater moves off with a speed of 2.8 m/s, what is the corresponding speed of the smaller skater? E12.A rifle with a mass of 3.4 kg fires a bullet with a mass of 7.8 g (0.0078 kg). The bullet moves with a muzzle velocity of 860 m/s after the rifle is fired. (a) What is the momentum of the bullet after the rifle is fired?

E7A 75-kg front-seat passenger in a car moving initially with a speed of 23 m/s (50 MPH) is brought to rest by an air bag in a time of 0.3 s. What is the impulse acting on the passenger? E8.A ball traveling with an initial momentum of 1.7 kg-m/s bounces off a wall and comes back in the opposite direction with a momentum of -1.7 kg-m/s. What is the change in momentum of the ball? E9.A ball traveling with an initial momentum of 5.1 kg-m/s bounces off a wall and comes back in the opposite direction with a momentum of -4.3 kg-m/s. What impulse is required to produce this change? E11.An ice skater with a mass of 70 kg pushes off against a second skater with a mass of 30 kg. Both skaters are initially at rest. (a) What is the total momentum of the system after they push off? (b) If the larger skater moves off with a speed of 2.8 m/s, what is the corresponding speed of the smaller skater? E12.A rifle with a mass of 3.4 kg fires a bullet with a mass of 7.8 g (0.0078 kg). The bullet moves with a muzzle velocity of 860 m/s after the rifle is fired. (a) What is the momentum of the bullet after the rifle is fired?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

### Physics Momentum and Impulse Problems

**E7.** A 75-kg front-seat passenger in a car moving initially with a speed of 23 m/s (50 MPH) is brought to rest by an airbag in a time of 0.3 s. What is the impulse acting on the passenger?
- [Answer box]

**E8.** A ball traveling with an initial momentum of 1.7 kg·m/s bounces off a wall and comes back in the opposite direction with a momentum of -1.7 kg·m/s.
What is the change in momentum of the ball?
- [Answer box]

**E9.** A ball traveling with an initial momentum of 5.1 kg·m/s bounces off a wall and comes back in the opposite direction with a momentum of -4.3 kg·m/s. What impulse is required to produce this change?
- [Answer box]

**E11.** An ice skater with a mass of 70 kg pushes off against a second skater with a mass of 30 kg. Both skaters are initially at rest.

(a) What is the total momentum of the system after they push off?
- [Answer box]

(b) If the larger skater moves off with a speed of 2.8 m/s, what is the corresponding speed of the smaller skater?
- [Answer box]

**E12.** A rifle with a mass of 3.4 kg fires a bullet with a mass of 7.8 g (0.0078 kg). The bullet moves with a muzzle velocity of 860 m/s after the rifle is fired.

(a) What is the momentum of the bullet after the rifle is fired?
- [Answer box]

(b) If external forces acting on the rifle can be ignored, what is the recoil velocity of the rifle?
- [Answer box]

**E13.** A rocket ship at rest in space gives a short blast of its engine, firing 60 kg of exhaust gas out the back end with an average velocity of 450 m/s. What is the change in momentum of the rocket during this blast?
- [Answer box]

**E14.** A railroad car with a mass of 13,000 kg collides and couples with a second car of mass 20,000 kg that is initially at rest. The first car is moving with a speed of 3.5 m/s prior

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