Table of Contents
What are 3 ways to decrease the force of 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 affects the magnitude of friction?
The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces (ii) roughness of the surface (iii) deformation of bodies.
How can frictional force be increased decreased?
Use of lubricants: In machines, friction can be reduced by applying lubricants between the contact surfaces to fill the fine pores or depressions in the surfaces and make them smooth thereby reducing friction. Polishing : unevenness of the surfaces can be reduced by polishing, thereby reducing the friction.
Can we increase or decrease friction?
By making the surface rough ,friction force can be increased. when a ground or surface become slippery after rain or water splashing it is made rough by spreading sand to increase the friction. To decrease friction: (i) Friction between two surfaces can be decreased by using lubricants.
When would you want to decrease friction?
Sometimes we want to reduce friction. For example, we use oil to reduce the friction between the moving parts inside a car engine. The oil holds the surfaces apart and can flow between them. The reduced friction means there is less wear on the car’s moving parts and less heat produced.
How can we reduce the amount of friction?
There are a number of ways to reduce friction: Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction. Some swimmers wear suits to reduce underwater resistance. These suits mimic the smooth skin of sharks. Lubrication is another way to make a surface smoother.
How does lubricant reduce friction between two surfaces?
Lubricants: Friction between two surfaces can be decreased by using lubricants. A lubricant is a substance (a solid or a liquid) which forms a thin layer between the two surfaces in contact. It also fills the depressions present in the surfaces of contact and reduces friction considerably.
When do you know the force of friction?
The moment the object first starts moving is also almost equivalent to the maximum force provided by friction while the object was at rest or static. Force applied equals the magnitude of force of friction in constant motion. If you find the force of friction (F f ), you know the Force applied (F A)
When is the net force of friction zero?
Net force (sum of overall forces on an object) must be zero if there is no acceleration. When an object is at rest (static) the surfaces between objects are settled and closer together. With surfaces closer together there is more interaction and therefore more static friction friction than kinetic.