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.
What are the 4 factors affecting friction?
- Roughness/smoothness of the sliding object.
- Roughness/smoothness of the surface.
- Shape/design of the object.
- Normal force acting upon the sliding bodies.
- Dry friction is independent of the surface area of a contact.
- Type of friction involved(rolling/sliding)
What are the factors affecting friction Class 8?
The nature of the surface (smoothness or roughness)
affects the friction. Smooth surfaces have lesser irregularities. The lesser the irregularities, the lesser the tendency to lock. The lesser the tendency to lock with another object, the lesser the friction (that is tendency to oppose motion).
What are the factors that affect friction between two surfaces?
The factors that affect the friction between two surfaces are
the weight of the object and the coefficient of friction of the surface.
What are 3 factors that affect 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
.
What are 5 examples of friction?
- Driving of a a vehicle on a surface.
- Applying brakes to stop a moving vehicle.
- Skating.
- Walking on the road.
- Writing on notebook/ blackboard.
- Flying of aeroplanes.
- Drilling a nail into wall.
- Sliding on a garden slide.
Which type of friction is the weakest?
Rolling friction
is the weakest kind of friction. It is the force that resists the motion of an object rolling across a surface.
What can reduce 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.
Is friction affected by speed?
sliding or kinetic friction between 2 surfaces that are moving relative to each other
does not change with speed
, but skin friction and drag is dependent on the speed, which you and others have noted: the faster the speed, the greater the ‘drag’.
What are two primary factors in friction?
- a) The materials that are in contact. The two materials and the nature of their surfaces. …
- b) The force pushing the two surfaces together. Pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other.
What factors do not affect friction between two objects?
Friction does not depend on
the amount of surface area in contact between the moving bodies
or (within certain limits) on the relative speed of the bodies. It does, however, depend on the magnitude of the forces holding the bodies together.
What are three reasons why friction is needed?
We can walk because of friction between surface and legs
. Vehicles move and stop because of the friction of the brakes and the tires. Writing with pen requires friction and also rubbing with an eraser uses friction. Airplanes can fly and move in the air because of friction in the air called drag or air resistance.
What are the 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.
Does friction depend on contact area?
It does not depend the area of contact
; it doesn’t depend on the sliding speed. Friction does not depend on the amount of surface area in contact between the moving bodies or (within certain limits) on the relative speed of the bodies. It does, however, depend on the magnitude of the forces holding the bodies together.
What are the advantages and disadvantages of friction?
Friction produces unnecessary heat leading to the wastage of energy
. The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects. Forest fires are caused due to the friction between tree branches.
What are some examples of harmful friction?
- Slipping on ice.
- Wet roads.
- Mudslides.
