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Physics
Physics
Problem
Calculate the work done when a force
F
⃗
=
3
i
+
4
j
+
5
k
\vec F=3\mathbf i+4\mathbf j+5\mathbf k
F
=
3
i
+
4
j
+
5
k
N displaces a body through
d
⃗
=
2
i
−
j
+
k
\vec d=2\mathbf i-\mathbf j+\mathbf k
d
=
2
i
−
j
+
k
m. a)
−
7
-7
−
7
J b)
15
15
15
J c)
7
7
7
J d)
2
2
2
J
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