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Friction.. Video Lecture | Additional Study Material for JEE
FAQs on Friction.. Video Lecture - Additional Study Material for JEE
| 1. What is friction? |  |
Ans. Friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact. It acts in the opposite direction to the applied force and can cause objects to slow down or come to a complete stop.
| 2. How does friction affect the motion of an object? | |
Ans. Friction can either help or hinder the motion of an object. It can provide necessary traction for an object to move, such as the friction between the tires of a car and the road. On the other hand, it can also act as a resistance force, causing objects to slow down or stop due to the opposing force it creates.
| 3. What factors affect the amount of friction between two surfaces? | |
Ans. The amount of friction between two surfaces depends on several factors, including the nature of the surfaces, the normal force pressing the surfaces together, and the presence of any lubricants. Rough surfaces tend to have more friction compared to smooth surfaces, while increasing the normal force or adding lubricants can reduce friction.
| 4. How does friction cause wear and tear on objects? | |
Ans. Friction generates heat and can cause wear and tear on objects. When two surfaces rub against each other, the frictional force creates heat due to the resistance encountered. This heat can lead to increased wear and tear, resulting in the deterioration of the surfaces over time.
| 5. How can friction be reduced or increased? | |
Ans. Friction can be reduced by using lubricants between the two surfaces, which helps to minimize direct contact and frictional resistance. Additionally, smoothing or polishing the surfaces can also reduce friction. On the other hand, friction can be increased by increasing the force pressing the surfaces together or by making the surfaces rougher.
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