Which of the following is an example of a contact force?a)Magnetic forceb)Gravitational forcec)Electrostatic forced)Frictional forceCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Understanding Contact Forces
Contact forces are those that occur when two objects are physically touching each other. In this context, the correct answer is Frictional Force.
Types of Forces
- Magnetic Force:
- Acts at a distance between magnetic objects.
- Does not require physical contact.
- Gravitational Force:
- The force of attraction between two masses.
- Operates over a distance and does not involve contact.
- Electrostatic Force:
- The force between charged particles.
- Also acts at a distance without direct contact.
Frictional Force Explained
- Definition:
- Frictional force is the resistance that one surface or object encounters when moving over another.
- Nature of Force:
- It arises from direct contact between surfaces.
- It can be static (preventing motion) or kinetic (resisting motion during movement).
- Examples:
- When pushing a book across a table, the friction between the book and table resists the motion.
- Walking involves friction between shoes and the ground, allowing for movement.
Conclusion
In summary, the frictional force is the only example of a contact force among the given options. It is essential in everyday activities, enabling motion and preventing slips, while the other forces listed operate without direct contact.

Top Courses for Delhi Police Constable

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams