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) $F=m(a+g)=(74)(-1.7+9.81)=600\ N$
