Answered: 1. Jennifer is walking at 1.63 m/s. If…

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter11: Energy And Its Conservation

Section: Chapter Questions

Problem 101A

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1. Jennifer is walking at 1.63 m/s. If Jennifer weighs 540N, what is the magnitude of her momentum?

2. A 1.75-kg pistol fires a 1.0-g bullet with a muzzle speed of 1000 m/s. The bullet then strikes a 9-kg wooden block resting on a horizontal frictionless surface. The block and the embedded bullet then slide across the surface.

a. What is the kinetic energy of the bullet as it travels toward the block?

b. The explosive charge in the pistol acts for 0.001 s. What is the average force exerted on the bullet while it is being fired?

c. What is the speed of the "bullet + block" system immediately after the bullet is embedded in the block?

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