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Equilibrium and resultant forces
Forces can be resolved by splitting them into 2 components
Going through the angle then the components is Fcos otherwise it
Components in parallel direction can be added( or subtracted if they
are in opposite directions)
The combination of 2 components is a resultant force
F = x2 + Y 2
Where x is horizontal component and Y is the vertical component.
The angle, , the resultant makes with the horizontal (its direction) is
= tan-1 ( Y
If an object is said to be in equilibrium then the sum of the forces acting on the object
must be zero. This means that when you resolve the forces into perpendicular components
then the sum of the forces in each perpendicular direction must also be zero.