Consider the following statements 1. The electrostatic force is an example of a contact force. 2. The frictional force is an example of a contact force. 3. The nuclear force is an example of a contact force. Which of the following statements is/are correct?

Option 3 : Only 2

CONCEPT:

• Force: Force is an external effect in the form of a push or pulls that:

1. Produces or tries to produce motion in a body at rest.
2. Stops or tries to stop a moving body.
3. Changes or tries to change the direction of motion of the body.

• Contact forces are those types of forces that result when the two interacting objects are in contact with each other physically. 
  • Example: Friction force, tension force, Normal force, etc.

EXPLANATION:

• The electrostatic force is the force exerted by the charged body on another charged or uncharged body. It is called non-contact force because it attracts the objects which do not require that objects are in physical contact with each other. Thus statement 1 is incorrect.
• The frictional force is a contact force between two surfaces that are trying to move relative to each other (static friction) or is moving relative to each other (kinetic friction). Thus statement 2 is correct.
• The nuclear force is called a non-contact force because they act without any physical contact between the particles. Thus statement 3 is incorrect.