If A, B and C are hinged; joints B and C do not move relative to each other; P is the force applied at A and ∠ABC = ∠ACB = 60°, then force in the member BC is ______.
1
P / (\(2\sqrt{3}\))
2
zero
3
P * (\({\sqrt3}\) / 2)
4
P * (\(2\sqrt3\))
If A, B and C are hinged; joints B and C do not move relative to each other; P is the force applied at A and ∠ABC = ∠ACB = 60°, then force in the member BC is ______.