Table of Contents
- 1 What are the three ways to use friction?
- 2 How friction can be useful?
- 3 Which is useful friction Mcq?
- 4 What are the 4 main types of friction?
- 5 What are some ways that friction can be harmful?
- 6 What is friction and how does it work?
- 7 What is an example of kinetic friction in physics?
- 8 What is the role of friction in road traffic?
What are the three ways to use friction?
Examples
- Walking –We can walk only if we apply frictional force.
- Writing – A frictional force is created when the tip of the pen comes in contact with the surface of the paper.
- Skating – A thin film of water under the blade is necessary to make the skate slide.
How friction can be useful?
Friction always slows a moving object down. Friction can be a useful force because it prevents our shoes slipping on the pavement when we walk and stops car tyres skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding.
Is friction ever useful give at least two examples of how it can be useful?
The crumpled one falls faster because there is less air resistance acting on the paper. Friction can be useful. For example, friction between our shoes and the floor stop us from slipping and friction between tyres and the road stop cars from skidding.
Which is useful friction Mcq?
7. Sliding friction is less than rolling friction. 8. Friction decreases with increase in the smoothness of the surface….Friction Class 8 MCQs Questions with Answers.
Column I | Column II |
---|---|
1. Fluid friction | (a) Due to friction |
2. Lubricants | (b) Streamlined |
3. Wheels | (c) Increases friction |
4. Spring balance | (d) Drag |
What are the 4 main types of friction?
Different types of motion of the object gives rise to different types of friction. Generally, there are 4 types of friction. They are static friction, sliding friction, rolling friction, and fluid friction.
How is friction not useful in everyday life?
Friction is sometimes unhelpful. For example, if you don’t lubricate your bike regularly with oil, the friction in the chain and axles increases. Your bike will be noisy and difficult to pedal. When there is a lot of friction between moving parts, energy is lost to the surroundings as heat.
What are some ways that friction can be harmful?
How is friction harmful?
- Friction reduces the speed of the moving objects and it even stops the motion of the object.
- Friction between the objects produces heat.
- There will be wear and tear of the machine parts due to friction.
What is friction and how does it work?
Friction is a force that works against motion. While walking, friction helps us maintain our stability and prevents us from slipping. Friction also works the same way with cars and vehicles in general, preventing them from skidding and helping them stop when the brakes are applied. Consider two different situations.
What are some examples of friction in everyday life?
One of the best examples is slowing down the vehicles on the road during the rainy season. Friction is a natural phenomenon that occurs when there is contact between two objects. Where there is friction, there will be a loss of energy.
What is an example of kinetic friction in physics?
Kinetic friction occurs between moving objects, that is when one object moves on another object. A good example is when you ride a bicycle on a road. The wheels of the bicycle move on the road. The bicycle will slow down until it comes to a halt.
What is the role of friction in road traffic?
Friction is the force that opposes the tyre rubber from sliding on the road surface. This friction avoids skidding of vehicles. Applications of breaks in the vehicle to stop it- Friction braking is the most widely used braking method in vehicles.