As a car slows down from 28 m/s to rest its kinetic energy is converted to other forms of energy such as heat and sound. The rate at which this conversion takes place is determined by the car’s deceleration which is the rate at which the car’s velocity changes.

The deceleration of a car can be caused by several factors such as the friction between the tires and the road the drag of the air on the car and the braking system. The friction between the tires and the road is the primary cause of deceleration and it is affected by the car’s weight the surface of the road and the weather conditions.

The weight of the car the surface of the road and the weather conditions all affect the drag of the air on the car. The drag of the air is determined by the car’s frontal area the shape of the car and the air density.

The braking system is the final factor that affects the deceleration of a car. The braking system is designed to convert the kinetic energy of the car into heat which is then dissipated by the brakes. The efficiency of the braking system is affected by the type of brakes the condition of the brakes and the driver’s inputs.

## Why does a car need to slow down?

A car needs to slow down because it uses less fuel when it is going at a lower speed.

## How does a car slow down?

A car typically slows down by pressing on the brakes which causes the wheels to stop turning.

## What happens to a car’s speed when it slows down?

A car’s speed decreases when it slows down.

## How much does a car’s speed decrease when it slows down from 28 m/s to rest?

A car’s speed decreases by 28 m/s when it slows down from 28 m/s to rest.

## What is the final speed of a car that slows down from 28 m/s to rest?

The final speed of a car that slows down from 28 m/s to rest is 0 m/s.

## How long does it take a car to slow down from 28 m/s to rest?

It takes a car 1 second to slow down from 28 m/s to rest.

## How much distance does a car travel while it is slowing down from 28 m/s to rest?

A car travels 28 meters while it is slowing down from 28 m/s to rest.

## What is the initial kinetic energy of a car that is moving at 28 m/s?

The initial kinetic energy of a car that is moving at 28 m/s is 784 J.

## What is the final kinetic energy of a car that slows down from 28 m/s to rest?

The final kinetic energy of a car that slows down from 28 m/s to rest is 0 J.

## How much kinetic energy does a car lose when it slows down from 28 m/s to rest?

A car loses 784 J of kinetic energy when it slows down from 28 m/s to rest.

## What is the work done on a car that slows down from 28 m/s to rest?

The work done on a car that slows down from 28 m/s to rest is -784 J.

## How much power is required to slow down a car from 28 m/s to rest in 1 second?

784 W of power is required to slow down a car from 28 m/s to rest in 1 second.

## What is the braking force required to stop a car that is moving at 28 m/s in 1 second?

784 N of braking force is required to stop a car that is moving at 28 m/s in 1 second.

## What is the mass of a car that requires 784 N of braking force to stop in 1 second?

100 kg is the mass of a car that requires 784 N of braking force to stop in 1 second.

## What is the deceleration of a car that slows down from 28 m/s to rest in 1 second?

28 m/s/s is the deceleration of a car that slows down from 28 m/s to rest in 1 second.