You can think of the work-energy theorem as a second theory of motion, parallel to Newton's laws in describing how outside influences affect the motion of an object. In this problem, solve parts (a), (b), and (c) separately from parts (d) and (e) so you can compare the predictions of the two theories. A bullet with mass of 15 grams is accelerated from rest to a speed of 780 m/s in a rifle barrel of length 72 cm. a) Calculate the bullet's kinetic energy when it leaves the barrel. b) Use the work-energy theorem to find the net work that is done on the bullet. c) Use your answer from part (b) to find the

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter7: Energy Of A System
Section: Chapter Questions
Problem 25P: Review. You can think of the workkinetic energy theorem as a second theory of motion, parallel to...
icon
Related questions
Topic Video
Question
14. You can think of the work-energy theorem as a second theory of motion, parallel to
Newton's laws in describing how outside influences affect the motion of an object. In
this problem, solve parts (a), (b), and (c) separately from parts (d) and (e) so you can
compare the predictions of the two theories. A bullet with mass of 15 grams is
accelerated from rest to a speed of 780 m/s in a rifle barrel of length 72 cm. a) Calculate
the bullet's kinetic energy when it leaves the barrel. b) Use the work-energy theorem to
find the net work that is done on the bullet. c) Use your answer from part (b) to find the
magnitude of the average net force that acted on the bullet while it was in the barrel. d)
Now model the bullet as a particle under constant acceleration. Use the kinematic
equations to find the acceleration of the bullet. e) Use your answer from part (d) to find
the magnitude of the average net force that acted on the bullet while it was in the barrel.
Transcribed Image Text:14. You can think of the work-energy theorem as a second theory of motion, parallel to Newton's laws in describing how outside influences affect the motion of an object. In this problem, solve parts (a), (b), and (c) separately from parts (d) and (e) so you can compare the predictions of the two theories. A bullet with mass of 15 grams is accelerated from rest to a speed of 780 m/s in a rifle barrel of length 72 cm. a) Calculate the bullet's kinetic energy when it leaves the barrel. b) Use the work-energy theorem to find the net work that is done on the bullet. c) Use your answer from part (b) to find the magnitude of the average net force that acted on the bullet while it was in the barrel. d) Now model the bullet as a particle under constant acceleration. Use the kinematic equations to find the acceleration of the bullet. e) Use your answer from part (d) to find the magnitude of the average net force that acted on the bullet while it was in the barrel.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Mechanical Work done
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Physics for Scientists and Engineers with Modern …
Physics for Scientists and Engineers with Modern …
Physics
ISBN:
9781337553292
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Physics for Scientists and Engineers
Physics for Scientists and Engineers
Physics
ISBN:
9781337553278
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Principles of Physics: A Calculus-Based Text
Principles of Physics: A Calculus-Based Text
Physics
ISBN:
9781133104261
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
College Physics
College Physics
Physics
ISBN:
9781938168000
Author:
Paul Peter Urone, Roger Hinrichs
Publisher:
OpenStax College
Physics for Scientists and Engineers, Technology …
Physics for Scientists and Engineers, Technology …
Physics
ISBN:
9781305116399
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
College Physics
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning