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Physics
Physics
Problem
Two constant forces act on a particle that undergoes a displacement
s
=
5
i
^
−
j
^
+
2
k
^
m
\mathbf{s}=5\,\hat i-\hat j+2\,\hat k\,\text{m}
s
=
5
i
^
−
j
^
+
2
k
^
m
. The forces are
F
1
=
2
i
^
+
3
j
^
−
k
^
N
\mathbf{F}_1=2\,\hat i+3\,\hat j-\hat k\,\text{N}
F
1
=
2
i
^
+
3
j
^
−
k
^
N
and
F
2
=
−
i
^
+
4
j
^
+
2
k
^
N
\mathbf{F}_2=-\hat i+4\,\hat j+2\,\hat k\,\text{N}
F
2
=
−
i
^
+
4
j
^
+
2
k
^
N
. The net work done by the two forces is a)
5
J
5\,\text{J}
5
J
b)
14
J
14\,\text{J}
14
J
c)
0
J
0\,\text{J}
0
J
d)
−
5
J
-5\,\text{J}
−
5
J
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