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Physics
Physics
Problem
A force
F
⃗
=
4
i
−
2
j
+
3
k
\vec F=4\mathbf i-2\mathbf j+3\mathbf k
F
=
4
i
−
2
j
+
3
k
N acts on a body that is displaced by
d
⃗
=
2
i
+
b
j
+
c
k
\vec d=2\mathbf i+b\mathbf j+c\mathbf k
d
=
2
i
+
b
j
+
c
k
m. The displacement is perpendicular to
i
+
j
+
k
\mathbf i+\mathbf j+\mathbf k
i
+
j
+
k
, and the work done is
12
12
12
J. Determine the value of
b
b
b
. a)
4
4
4
b)
−
2
-2
−
2
c)
2
2
2
d)
−
1
-1
−
1
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