0.21.
The minimum coefficient of static friction can be obtained from this equation: If the velocity of the car is 72 km/hr (20 m/s) and the radius of curvature R = 190 m, the minimum value of the coefficient of static friction is 0.21.
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What is the coefficient of static friction?
The coefficient of static friction is the ratio of the maximum static friction force (F) between the surfaces in contact before movement commences to the normal (N) force.
What is the maximum and minimum value of static friction?
A value of 1 means the frictional force is equal to the normal force. The coefficient of friction depends on the objects that are causing friction. The value is usually between 0 and 1 but can be greater than 1. A value of 0 means there is no friction at all between the objects.
What minimum coefficient of friction is needed?
0.4
Centripetal acceleration is given by a=v2r . The minimum friction coefficient required is 0.4 .
What is the maximum coefficient of static friction?
= μs N
The maximum static friction force is: (fs)max = μs N where μs is the coefficient of static friction. Static friction is subtle because the static friction force is variable and depends on the external forces acting on an object. That is, fs ≤ μs N, while (fs)max = μs N.
Can coefficient of friction be less than 1?
The coefficient of friction depends on the objects that are causing friction. The value is usually between 0 and 1 but can be greater than 1. A value of 0 means there is no friction at all between the objects; such is possible with Superfluidity.
Is the coefficient of static friction greater than the coefficient of kinetic friction?
Kinetic friction (also referred to as dynamic friction) is the force that resists the relative movement of the surfaces once they’re in motion. The static friction between two surfaces is always higher than the kinetic friction (at least, in practical, real-world applications).
How do you find the minimum coefficient of static friction in circular motion?
The centripetal force causing the car to turn in a circular path is due to friction between the tires and the road. A minimum coefficient of friction is needed, or the car will move in a larger-radius curve and leave the roadway. We know that Fc=mv2r. Thus Fc=mv2r=(900.0kg)(25.00m/s)2(500.0m)=1125N.
What minimum value must the coefficient of static friction have if the pipe is not to slip?
1/3
For no slipping to occur, the coefficient of static friction must be greater than or equal to (1/3)tanθ ( 1 / 3 ) tan θ .
How do you find the coefficient of static friction on an inclined plane?
Use a coordinate system with +x down the slope and +y perpendicular to the slope. Split the force of gravity into x and y components. Apply Newton’s second law twice. So, the coefficient of static friction is equal to the tangent of the angle at which the objects slide.
Can coefficient of friction be more than 1?
A coefficient of friction that is more than one just means that friction is stronger than the normal force. An object such as silicon rubber for example, can have a coefficient of friction much greater than one.
What does a high coefficient of static friction mean?
A higher coefficient of friction means that more friction force is present relative to the normal force. There are two types of coefficients of friction. One is kinetic, which means the object or objects are already in motion; the other is static, which means the objects are at rest.
Why is the coefficient of friction usually less than 1?
A value of 0 means there is no friction at all between the objects. This is only theoretically possible. All objects in the real world will have some friction when they touch each other. A value of 1 means the frictional force is equal to the normal force.
Can the coefficient of static friction be negative?
It can not exist. Static or sliding frictions are always there acting on the object. Frictional force and the applied force are always in opposite direction. So you will not see such a phenomenon with negative co-efficient of friction.
What does the coefficient of static friction equal to 0 mean?
The value equal to 0 means there is no friction between two objects.A coefficient of friction that is more than one just means that the frictional force is stronger than the normal force such as silicone rubber, can have a coefficient of static friction much greater than one.
Can the coefficient of static friction be less than that of kinetic friction?
So, common sense tells us that the coefficient of static friction can never be less than the coefficient of kinetic friction. Having greater kinetic than static friction just doesn’t make any sense in terms of the phenomena being described.
Why is the coefficient of kinetic friction less than the coefficient of static friction?
Kinetic friction is less than the static friction because in kinetic friction one object is in moving condition & there is less inter molecular attraction b/w the objects whereas in static friction there is relative motion & thus there is much more inter molecular attraction & this is only why we need less force to
Is static friction less than limiting friction?
Static friction is less than limiting friction.
What is the least coefficient of friction for a plane inclined at an angle Ɵ with horizontal in order that a solid cylinder will roll down without slipping?
2/3 tan α
The least coefficient of friction for an inclined plane inclined at angle α with horizontal in order that a solid cylinder will roll down it without slipping is. 2/3 tan α
How do you calculate the coefficient of friction?
The formula to calculate the coefficient of friction is μ = f÷N. The friction force, f, always acts in the opposite direction of the intended or actual motion, but only parallel to the surface.
What does a lower coefficient of friction mean?
The coefficient of friction, µ, is a measure of the amount of friction existing between two surfaces. A low value of coefficient of friction indicates that the force required for sliding to occur is less than the force required when the coefficient of friction is high.