GENERAL KNOWLEDGE

Detailed explanation-1: -Therefore, clearly from the above discussion we can see that magnetic force, electrostatic force and gravitational force are all three non-contact forces. The only left force is muscular force. This means that muscular force is not a non-contact force.

Detailed explanation-2: -Muscular force can be applied only while in contact with the object. So, it is a contact force, not a non-contact force.

Detailed explanation-3: -Normal force is a contact force. If two surfaces are not in contact, they can’t exert a normal force on each other. For example, the surfaces of a table and a box cannot exert normal forces on each other if they are not in contact.

Detailed explanation-4: -Out of the given forces, electrostatic force and Gravity don’t require any contact to show their effect. Hence they are non-contact forces.

Detailed explanation-5: -Gravity. Is gravitational force a non contact force? Electrostatic force. The electric force is very similar to gravity, the difference here being that the gravitational force acts between the mass and the electric force acting between the two charged bodies. Magnetic force.