Here, I copy that last line for you before proceeding:
− x mg + xF = 0
2
N
g
m
F =
N
2
6.
kg
92
(9
.
)
newtons/kg
80
F =
N
2
F = 32 .
newtons
9
N
g
m
We can use this result ( F =
) in equation 23-6 (the one that reads F − mg + F = 0 ) to
N
2
P y
N
obtain a value for F :
Py
F − mg + F = 0
P y
N
F
= mg − F
P y
N
g
m
F
= m −
Py
g
2
g
m
F
=
Py
2
6.
(9
kg
92
.
)
newtons/kg
80
F
=
P y
2
F
= 32. newtons
9
P y
Recalling that we found F to be zero, we can write, for our final answer:
Px
F = 32.9 newtons, straight upward
P
and
F = 32.9 newtons, straight upward
N
1
59