Physics > 2008 > 9
JAMB UTME
I. All the three forces must be concurrent.
II. The upward force is equal to the downward force.
III. The algebraic sum of the moment about any point must be zero. Which of the above conditions must hold for a body acted upon by a system of three coplanar forces in equilibrium?
II. The upward force is equal to the downward force.
III. The algebraic sum of the moment about any point must be zero. Which of the above conditions must hold for a body acted upon by a system of three coplanar forces in equilibrium?
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III.
Answer: B
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