# Readers ask: What Is The Minimum Coefficient Of Static Friction Needed To Hold The Car On The Road?

## What minimum coefficient of static friction is required?

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.

## What is the minimum coefficient μs of static friction between the road and the car?

The minimum coefficient μs of static friction between the road and the car μs = 0.6116.

## How do you find the minimum static friction?

To find the minimum coefficient of static friction between two materials, construct an incline plane from one of the materials and place a body made from the other material on it. Increase the angle of the incline until the body starts to slide. The tangent of the angle is the coefficient of friction.

## 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.

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## What is the minimum coefficient of friction?

Friction coefficient as low as 0.05 between dry sliding surfaces has been achieved when the mechanical interactions are eliminated. This result has been achieved based on a hypothetical model of an ideal surface for low friction.

## What is the formula for coefficient of static friction?

It is usually symbolized by the Greek letter mu (μ). Mathematically, μ = F/N, where F is the frictional force and N is the normal force. Because both F and N are measured in units of force (such as newtons or pounds), the coefficient of friction is dimensionless.

## What is the coefficient of friction between the road and the car’s tires?

Jones and Childers report coefficients of friction of about 0.7 for dry roads and 0.4 for wet roads. The tread design represents an “all weather” compromise.

## Which friction is maximum?

The maximum value of static friction which is generated between two surfaces is known as the limiting friction. ∴ The maximum value of the static friction is called limiting friction.

## 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.

## What is Max static friction?

The maximum static friction represents the amount of force than needs to be applied in order to get the object to move. If the applied force is equal to or less than the maximum static friction, the object will not move.

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## What is tangential acceleration formula?

The tangential acceleration = radius of the rotation * its angular acceleration. It is always measured in radian per second square. Its dimensional formula is [T2]. When an object makes a circular motion, it experiences both tangential and centripetal acceleration.

## Why is static friction used in circular motion?

Gravity pulls down on the car with its weight, w = m g. The level road pushes up with a normal force n and horizontally with a friction force Ffrict. This is the force of static friction!

## How do you find the coefficient of static friction given acceleration?

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.