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Problem
Problem
Work done when a force
F
=
(
i
^
+
2
j
^
+
3
k
^
)
N
\mathbf{F} = (\hat{i} + 2\hat{j} + 3\hat{k}) \text{ N}
F
=
(
i
^
+
2
j
^
+
3
k
^
)
N
acting on a particle takes it from the point
r
1
=
(
i
^
+
j
^
+
k
^
)
\mathbf{r}_1 = (\hat{i} + \hat{j} + \hat{k})
r
1
=
(
i
^
+
j
^
+
k
^
)
to the point
r
2
=
(
i
^
−
j
^
+
2
k
^
)
\mathbf{r}_2 = (\hat{i} - \hat{j} + 2\hat{k})
r
2
=
(
i
^
−
j
^
+
2
k
^
)
is a.
−
3
J
-3 \text{ J}
−
3
J
b.
−
1
J
-1 \text{ J}
−
1
J
c. zero d.
2
J
2 \text{ J}
2
J
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