A heavy beam is resting on two supports, so that there are three forces acting on it.
The beam is in equilibrium.
Which statement is correct?
1 )
All the forces are equal in value.
2 )
The forces are in one direction and their turning effects are in the opposite direction.
The resultant force is zero and the resultant turning effect is zero.
4 )
The total upward force is twice the total downward force.
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