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Mathematics
Mathematics
Problem
A force of
40
N
40\,\text{N}
40
N
makes an angle of
20
∘
20^{\circ}
2
0
∘
with the negative y-axis directed towards the positive x-axis. The force expressed in unit-vector notation is a)
37.6
i
^
−
13.7
j
^
37.6\,\mathbf{\hat i} - 13.7\,\mathbf{\hat j}
37.6
i
^
−
13.7
j
^
b)
13.7
i
^
+
37.6
j
^
13.7\,\mathbf{\hat i} + 37.6\,\mathbf{\hat j}
13.7
i
^
+
37.6
j
^
c)
13.7
i
^
−
37.6
j
^
13.7\,\mathbf{\hat i} - 37.6\,\mathbf{\hat j}
13.7
i
^
−
37.6
j
^
d)
−
13.7
i
^
−
37.6
j
^
-13.7\,\mathbf{\hat i} - 37.6\,\mathbf{\hat j}
−
13.7
i
^
−
37.6
j
^
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