- What causes friction?
- How does friction affect speed?
- Where is friction useful?
- What are 3 ways you can reduce friction?
- How can friction hurt you?
- What is friction force examples?
- How is friction good and bad?
- What bad things can friction cause?
- What is friction not useful for?
- Where friction is not needed?
- What are the three advantages and disadvantages of friction?
- Is friction an evil?
- Which is wasteful friction?
- What are the methods to reduce friction?
- What are the three disadvantages of friction?
- Is friction good or evil Explain with examples?
- What are the advantages of rolling friction?
What causes friction?
Friction is a force that resists the relative motion between two objects or materials.
The causes of this resistive force are molecular adhesion, surface roughness, and deformations.
Adhesion is the molecular force resulting when two materials are brought into close contact with each other..
How does friction affect speed?
When a force makes something move, it will travel a certain distance in a measurable amount of time. This determines its speed. It will keep moving until it is acted upon by force or friction.
Where is friction useful?
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.
What are 3 ways you can reduce friction?
Methods for decreasing friction:Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction.Lubrication is another way to make a surface smoother. … Make the object more streamlined. … Reduce the forces acting on the surfaces. … Reduce the contact between the surfaces.
How can friction hurt you?
Sometimes the friction is bad because it can hurt your loose tooth when you’re brushing it. Also, if you brush too hard, and there’s too much friction, it can hurt. … If you brush too hard, it could hurt you. Scrubbing helps clean, but scrubbing too hard can damage an object.
What is friction force examples?
For example, if a book slides across the surface of a desk, then the desk exerts a friction force in the opposite direction of its motion. Friction results from the two surfaces being pressed together closely, causing intermolecular attractive forces between molecules of different surfaces.
How is friction good and bad?
Friction force always acts opposite direction of motion of the body. Good effects— (i) Friction between our shoes and the floor stop us from slipping. (ii) Friction between tyres and the road stop cars from skidding. Example: car tyres and brakes heat up due to friction.
What bad things can friction cause?
The biggest disadvantage of friction is wear and tear that happens as a result of friction. Wear is the gradual removal of material at solid surfaces occurring as a result of damage caused by friction and/or corrosion. Wear leads to loss of functionality. Tribology is the study of wear of materials.
What is friction not useful for?
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.
Where friction is not needed?
1.) When you fall down and slide along a downward sloping asphalt road, face down, friction is harmful. 2.) Writing with your Parker fountain pen on a poorly finished wall.
What are the three advantages and disadvantages of friction?
Disadvantages of friction:It always resists the motion, so extra energy is required to overcome it.It causes wear and tear of machines.It decreases the life expectancy of moving parts of vehicles.Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil.
Is friction an evil?
Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. But almost all crucial tasks cannot be carried out without the presence of friction. Basic activities like walking and writing on a surface are possible due to friction.
Which is wasteful friction?
Answer. Though friction is said to be a waste of energy in most of the times, it is really useful at many times in regular life. We need to increase the frictional force while pressing the brakes of a car or a bicycle to stop it at the right time.
What are the methods to reduce friction?
By polishing the surface, as polishing makes the surface smooth and friction can be reduced. Using lubricants such as oil or grease can reduce the friction between the surfaces. When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings.
What are the three disadvantages of friction?
Disadvantages of friction:Friction produces a lot of heat in various parts of the machinery and this leads to wastage of energy as heat.Opposes motion, hence more energy is needed to overcome friction.Noise production in machines is irritating as well as leads to energy loss.Forest fires are caused due to friction between branches of trees.More items…
Is friction good or evil Explain with examples?
A matchstick lights up due to the friction against the side of matchbox when we strike it, This can destroy houses when catches fire. The shoes of athletes are provided with spikes so as to increase friction and prevent slipping. The force of friction helps to hold the nails and screws on the walls and in the wood.
What are the advantages of rolling friction?
The fact that rolling friction is less than moving friction is used in ball bearings or roller bearings to decrease losses due to friction. Rolling friction is smaller than sliding friction.