# Calculating Work and Distance for a Braking Automobile

In summary, friction is a force that resists the motion of objects when they come into contact with each other. It can be classified as static or kinetic, and can be reduced by using lubricants, polishing surfaces, or using wheels or rollers. The coefficient of friction is a dimensionless quantity that represents the ratio of the force of friction to the normal force between two surfaces. Friction is present in many everyday activities and is important in industrial processes.

## Homework Statement

an autombile 2200kg moves with a velocity of 32m/s on a level road.
a comstant braking force of 6000N is applied to the automobile wheels bringing it to a stop eventually
a) what distance will the vehicle travel after the brake are applied?
b) calcutate the work done by the car during this time?
thanks

F=ma

## The Attempt at a Solution

What kinematics equations do you have?

I don't know how friction can be factored into this.

## What is friction?

Friction is a force that resists the motion of objects when they come into contact with each other. It is caused by the roughness of surfaces and the interlocking of microscopic irregularities.

## What is the difference between static and kinetic friction?

Static friction is the force that prevents an object from moving when a force is applied to it. Kinetic friction is the force that resists the motion of an object that is already in motion.

## How can friction be reduced?

Friction can be reduced by using lubricants such as oil or grease, polishing surfaces to make them smoother, or by using wheels or rollers to reduce the amount of surface area in contact.

## What is the coefficient of friction?

The coefficient of friction is a measure of the amount of friction between two surfaces. It is a dimensionless quantity that represents the ratio of the force of friction to the normal force between the two surfaces.

## What are some real-world applications of friction?

Friction is present in many everyday activities, such as walking, driving, and playing sports. It is also important in industrial processes, such as braking systems in cars and the operation of machines in factories.

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