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Mathematics
Problem
A force vector has components
A
x
=
6.0
×
10
2
N
A_x = 6.0\times10^{2}\,\text N
A
x
=
6.0
×
1
0
2
N
and
A
y
=
−
8.0
×
10
2
N
A_y = -8.0\times10^{2}\,\text N
A
y
=
−
8.0
×
1
0
2
N
. Which of the following is the unit vector
a
^
\hat a
a
^
in the direction of the force? a)
0.75
i
^
−
0.66
j
^
0.75\,\hat i - 0.66\,\hat j
0.75
i
^
−
0.66
j
^
b)
0.60
i
^
−
0.80
j
^
0.60\,\hat i - 0.80\,\hat j
0.60
i
^
−
0.80
j
^
c)
0.60
i
^
+
0.80
j
^
0.60\,\hat i + 0.80\,\hat j
0.60
i
^
+
0.80
j
^
d)
0.80
i
^
−
0.60
j
^
0.80\,\hat i - 0.60\,\hat j
0.80
i
^
−
0.60
j
^
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