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Physics
Problem
Which one of the following conditions must be satisfied for a body to remain in static equilibrium along a straight horizontal line? a)
∑
F
=
m
a
\sum F = ma
∑
F
=
ma
b)
∑
F
=
m
g
\sum F = mg
∑
F
=
m
g
c)
∑
F
=
0
\sum F = 0
∑
F
=
0
d)
∑
F
=
−
m
a
\sum F = -ma
∑
F
=
−
ma
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