The three forces in equilibrium refer to a system where the net force acting on an object is equal to zero. These forces are known as the applied force, the normal force, and the frictional force.
To determine if the three forces are in equilibrium, you can use the principle of vector addition. If the sum of all three forces acting on an object is zero, then the forces are in equilibrium.
If the three forces are not in equilibrium, then the object will experience a net force and will accelerate in the direction of that force. This acceleration is directly proportional to the net force and inversely proportional to the object's mass (Newton's Second Law).
Yes, an object can still be in equilibrium even if it is moving. This is because the forces acting on the object may be balanced in such a way that the object is moving at a constant velocity.
The angle of the applied force does not affect equilibrium as long as the net force acting on the object is zero. The components of the applied force in the horizontal and vertical directions are what determine the equilibrium of the object.