The three forces discussed in this question are gravitational force, normal force, and frictional force.
Gravitational force pulls objects towards the center of the Earth, normal force is perpendicular to the surface of contact and prevents objects from sinking into surfaces, and frictional force opposes the motion of an object.
Yes, these forces can be balanced. For example, when an object is at rest on a horizontal surface, the normal force and gravitational force are equal and opposite, resulting in a balanced force.
Yes, these forces are always present in any situation involving an object. However, their magnitude and direction may vary depending on the specific scenario.
To calculate the net force on an object, we need to consider the magnitude and direction of each individual force acting on the object and add them vectorially. This can be done using the formula Fnet = m*a, where Fnet is the net force, m is the mass of the object, and a is the acceleration.