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Physics
Physics
Problem
A particle is acted upon by three forces
F
⃗
1
,
F
⃗
2
\vec F_1,\,\vec F_2
F
1
,
F
2
and
F
⃗
3
\vec F_3
F
3
. For the particle to remain in translational equilibrium, which one of the following conditions must hold? a)
F
⃗
1
+
F
⃗
2
=
F
⃗
3
\vec F_1+\vec F_2=\vec F_3
F
1
+
F
2
=
F
3
b)
∣
F
⃗
1
∣
=
∣
F
⃗
2
∣
=
∣
F
⃗
3
∣
|\vec F_1|=|\vec F_2|=|\vec F_3|
∣
F
1
∣
=
∣
F
2
∣
=
∣
F
3
∣
c)
F
⃗
1
+
F
⃗
2
+
F
⃗
3
=
0
\vec F_1+\vec F_2+\vec F_3=\mathbf 0
F
1
+
F
2
+
F
3
=
0
d)
F
⃗
1
×
(
F
⃗
2
+
F
⃗
3
)
=
0
\vec F_1\times (\vec F_2+\vec F_3)=\mathbf 0
F
1
×
(
F
2
+
F
3
)
=
0
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