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Name: A bullet of mass mb is fired horizontally with speed vi at a wooden bl
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Description: A bullet of mass mb is fired horizontally with speed vi at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block,

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter6: Momentum, Impulse, And Collisions

Section: Chapter Questions

Problem 45P: A tennis ball of mass 57.0 g is held just above a basketball of mass 590 g. With their centers...

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A bullet of mass mb is fired horizontally with speed vi at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed vf . Part A Which of the following best describes this collision? Hint 1. Types of collisions An inelastic collision is a collision in which kinetic energy is not conserved. In a partially inelastic collision, kinetic energy is lost, but the objects colliding do not stick together. From this information, you can infer what completely inelastic and elastic collisions are. ANSWER: Correct Part B Which of the following quantities, if any, are conserved during this collision? Hint 1. When is kinetic energy conserved? Kinetic energy is conserved only in perfectly elastic collisions. ANSWER: perfectly elastic partially inelastic perfectly inelastic Correct Part C What is the speed of the block/bullet system after the collision? Express your answer in terms of vi , mw , and mb . You did not open hints for this part. ANSWER: kinetic energy only momentum only kinetic energy and momentum neither momentum nor kinetic energy

An inelastic collision is a collision in which kinetic energy is not conserved. In a partially inelastic collision,
kinetic energy is lost, but the objects colliding do not stick together. From this information, you can infer
what completely inelastic and elastic collisions are.
ANSWER:
Correct
Part B
Which of the following quantities, if any, are conserved during this collision?
Hint 1. When is kinetic energy conserved?
Kinetic energy is conserved only in perfectly elastic collisions.
ANSWER:
O perfectly elastic
O partially inelastic
• perfectly inelastic
Correct
Part C
What is the speed of the block/bullet system after the collision?
Express your answer in terms of v, mw, and m -
You did not open hints for this part.
ANSWER:
O kinetic energy only
O momentum only
O kinetic energy and momentum
O neither momentum nỚT KeC eergy

To understand how points are awarded, read the Grading Policy for this assignment.
A Bullet Is Fired into a Wooden Block
A bullet of mass m, is fired horizontally with speed vy at a wooden block of mass m, resting on a frictionless table.
The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the
block, the block, with the bullet in it, is traveling at speed ty
Before collision
After collision
Part A
Which of the following best describes this collision?
Hint 1. Types of collisions
An inelastic collision is a collision in which kinetic energy is not conserved. In a partially inelastic collision,
kinetic energy is lost, but the objects colliding do not stick together. From this information, you can infer
what completely inelastic and elastic collisions are.
ANSWER:

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