Answer
a). $269.5N$
b). $381.1N$
Work Step by Step
a). $2T-mg=0$
$T=\frac{mg}{2}=\frac{55\times9.8}{2}=269.5N$
b). $Tcos\theta=\frac{1}{2}mg$
$T=\frac{mg}{2cos\theta}=\frac{55\times9.8}{2cos45^{\circ}}=381.1N$
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
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 137: 48
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