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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?

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? Correct Answer 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.

Related Questions

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