What is friction in simple words?
What is friction in simple words?
Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
What is friction explain?
Friction is a force between two surfaces that are sliding, or trying to slide, across each other. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move. Friction always slows a moving object down.
What is friction and its uses?
Answers. Friction is a resistance force that slows down or prevents motion, it is necessary for many applications where you might want to hold items or do things and prevent slipping or sliding. Friction is used in car brakes, when we walk or climb a hill, making a fire, skiing down a hill, and more.
What is friction Ncert?
Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engine can cause the parts to wear out.
What are the advantages of friction?
Advantages of Friction:Friction is responsible for many types of motion.It helps us walk on the ground.Brakes in a car make use of friction to stop the car.Asteroids are burnt in the atmosphere before reaching Earth due to friction.It helps in the generation of heat when we rub our hands.
What are causes of 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.
What are the 3 types of friction?
Static, sliding, and rolling friction occur between solid surfaces. Static friction is strongest, followed by sliding friction, and then rolling friction, which is weakest. Fluid friction occurs in fluids, which are liquids or gases.
What causes friction short answer?
Friction is caused due to the irregularities on the two surfaces in contact. Even the smoothest surfaces have minute irregularities in them and these irregularities of the two surfaces interlock into each other and create friction. Larger the irregularities more is the friction.
What 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.
What are 4 types of friction?
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and gases.
What are some examples of useful friction?
Helpful frictional forces friction between tyres and the road stop cars from skidding. friction between the brakes and wheel help bikes and cars to slow down.
How we can increase friction?
There are two methods of increasing friction: one is by making the surfaces rough and the other by increasing the mass of the object that is moving. For example, the tyres of vehicles have treads (these are the ‘designs’ that you can see on the tyre surface), which increase the friction between the tyre and the road.
What 2 factors affect friction?
The strength of the force of friction depends on two factors; the type of surfaces involves and how hard the surfaces push together, What is one way you could reduce the friction between two surfaces? Ball bearing are one way of reducing friction between two surfaces.
How do shoes increase friction?
If the shoe and the surface are pressed together more firmly, the tiny bumps and indentations in the shoe and surface get caught up in each other more so increasing the friction.
How is friction bad?
Friction manifests as heat energy generally and sometimes as noise. When objects are moving against each other, there is a generation of kinetic energy. Friction causes this kinetic energy to change into thermal energy. The biggest disadvantage of friction is wear and tear that happens as a result of friction.
What would happen without friction?
Friction stops things from sliding apart. If there was no friction everything would slide to the lowest point. That is provided by friction. With no friction the only possible movement would be falling to a lower point under gravity.
How do I calculate friction?
For most purposes, you can use the formula F = μN to calculate friction, with N standing for the “normal” force and “μ” incorporating the characteristics of the surface.
What is the formula for friction loss?
Using the hand method, for each 100-foot length of 1¾-inch hose flowing 200 gpm, the friction loss is 48 psi: 2 x 4 x 6 = 48 psi. For a 3-inch supply line flowing 300 gpm, the friction loss per 100-foot section would be 9 psi: 3 squared equals 9 psi.
What does Friction Factor mean?
The friction factor or Moody chart is the plot of the relative roughness (e/D) of a pipe against the Reynold’s number. It was this chart which first enabled the user to obtain a reasonably accurate friction factor for turbulent flow conditions, based on the Reynolds number and the Relative Roughness of the pipe.
What is friction coefficient?
Coefficient of friction is defined as the ratio of the force required to move tow sliding surfaces over each other, and the force holding them together [18].
