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Mindmap: Friction | Science Class 8

The document Mindmap: Friction | Science Class 8 is a part of the Class 8 Course Science Class 8.
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FAQs on Mindmap: Friction - Science Class 8

1. What is friction?
Ans. Friction is a force that opposes the motion of an object when it comes into contact with another object or surface. It acts in the opposite direction to the applied force and can cause objects to slow down or come to a stop.
2. What causes friction?
Ans. Friction is caused by the irregularities in the surfaces of objects. When two objects are in contact, these irregularities interlock with each other, creating resistance to motion. The rougher the surfaces, the greater the friction.
3. How does friction affect the movement of objects?
Ans. Friction can either help or hinder the movement of objects. It can be useful in situations where we need to grip objects or stop them from sliding. However, friction can also slow down the movement of objects, making it harder to push or pull them.
4. What are the different types of friction?
Ans. There are several types of friction, including static friction, kinetic friction, rolling friction, and fluid friction. Static friction occurs when two objects are not moving relative to each other, while kinetic friction occurs when two objects are sliding past each other. Rolling friction occurs when an object rolls over a surface, and fluid friction occurs when an object moves through a fluid, such as air or water.
5. How can friction be reduced?
Ans. Friction can be reduced by using lubricants, such as oil or grease, between two surfaces. Lubricants create a thin layer that separates the surfaces, reducing the contact between them and minimizing friction. Additionally, smoother surfaces and reducing the weight or pressure between two objects can also help reduce friction.
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