College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 4 - Force and Motion - Learning Path Questions and Exercises - Exercises - Page 139: 81

Answer

a) $0.1786kg$ b) $0.8624m/s^{2}$

Work Step by Step

a). $T_{1}+coefficient\times m_{3}g=T_{2}$ from previous problem $m_{3}=\frac{m_{2}g-m_{1}g}{coefficient\times g}=\frac{m_{2}-m_{1}}{coefficient}=\frac{0.25-0.15}{0.56}=0.1786kg$ b). $T_{1}=m_{1}g+m_{1}a$ $T_{2}=m_{2}g-m_{2}a$ $T_{2}-T_{1}-f=m_{3}a$ So, $(m_{2}g-m_{2}a)-(m_{1}g+m_{1}a)-(coefficient\times m_{3}g)=m_{3}a$ a=$\frac{m_{2}-m_{1}-coefficient\times m_{3}}{m_{1}+m_{2}+m_{3}}g=0.8624m/s^{2}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.