## Essential University Physics: Volume 1 (4th Edition)

Published by Pearson

# Chapter 4 - Exercises and Problems - Page 71: 46

#### Answer

a) $F=726 \ N$ b) $F=726 \ N$ c) $F=726 \ N$ d) $F=852\ N$ e) $F=600\ N$

#### Work Step by Step

We use Newton's Second Law to find: a) $F=ma=(74)(9.81)=726 \ N$ b) $F=m(a+g)=(74)(9.81+0)=726 \ N$ c) $F=m(a+g)=(74)(0+9.81)=726 \ N$ d) $F=m(a+g)=(74)(9.81+1.7)=852\ N$ e) $F=m(a+g)=(74)(-1.7+9.81)=600\ N$

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