The forces F1 F2 Fn acting at the same point P are said

The forces F1, F2, . . . , Fn acting at the same point P are said to be in equilibrium if the resultant force is zero, that is, if F1 + F2 + ? + Fn = 0.

(a) Find the resultant forces acting at P.

(b) Find the additional force required (if any) for the forces to be in equilibrium.

Solution

a) resultant force at Pis R = F1 + F2 + F3 + F4

b) additional force required for forces to be in equilibrium = -R = - (F1 + F2 + F3 + F4)