# (b) What Is The Change In The Combined Thermal Energy Of The Car And The Road Surface?

## What happens to thermal energy in a car?

The internal combustion engine in the car converts the potential chemical energy in gasoline and oxygen into thermal energy which is transformed into the mechanical energy that accelerates the vehicle (increasing its kinetic energy) by causing the pressure and performing the work on the pistons.

## What is the change in the car’s kinetic energy?

Potential energy is the relates to the a set of forces (wind) that act on a body based on the body’s positioning. As litteacher indicated in the answer, the wind affect on the car is “potential energy.” Yes, a car’s kinetic energy changes with the speed.

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## What is the energy change for a braking car?

When a force is applied to the brakes of a vehicle, there is work done on the friction between the brakes and the wheel. This reduces the kinetic energy of the vehicle, slowing it down and causing the temperature of the brakes to increase.

## Does a car’s kinetic energy change more when the car speeds up from 10 to 15 m/s or from 15 to 20 m s?

Answer and Explanation: The kinetic energy changes more if the car goes from 15 m/s to 20 m/s.

## What happens to kinetic energy when a car slows down?

Any time your car slows down the kinetic energy stored in the vehicle has to go somewhere. These bits of energy go into heating the road, the surrounding air, and various spinning parts in your car. But the vast majority of the kinetic energy is converted into heat by your brake pads when you stomp on the brakes.

## What kind of energy makes a car move?

The mechanical energy moves the car. Burning fuel in an electric power plant produces heat.

## What are the factors that affect the kinetic energy of the vehicle?

The two main factors that affect kinetic energy are mass and speed. Why? Because the motion of an object depends on how fast it’s traveling, but also how much mass it has, though velocity is the more important factor.

## What can a driver do to drastically increase the kinetic energy of a car?

An important fact to know is that kinetic energy increases exponentially; this means that if you double your vehicle’s speed, your vehicle’s kinetic energy increases by four times. This also means your braking and stopping distance will be multiplied by four.

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## What is the final kinetic energy of the car?

The final kinetic energy will be zero, since the cart will come to a complete stop. Work is equal to the change in mechanical energy (in this case kinetic energy).

## Which does not transfer useful energy?

Wasted energy is energy that is not usefully transferred or transformed.

## When a driver applies the brakes and her car slows down what happens to its kinetic energy?

When slowing down or stopping, your vehicle’s brakes must overcome its kinetic energy. It is important to realize that you are not simply working against speed, as the car’s kinetic energy will be four times as great as the speed at which it is traveling. This means that your stopping distance will be squared too.

## When you double the weight of a vehicle the stopping distance?

The brake power required to stop a vehicle varies directly with its weight and the “square” of its speed. For example, if weight is doubled, stopping power must be doubled to stop in the same distance. If speed is doubled, stopping power must be increased four times to stop in the same distance.

## How does a car’s kinetic energy change when it speeds up from 10 to 20 m s?

When a car’s speed increases from 10 m/s to 20 m/s, the kinetic energy increases by a factor of four.

## Does the KE of a car change more when it goes from 10 to 20?

Does the KE of a car change more when it goes from 10 to 20 km/h or when it goes from 20 to 30 km/h? j So KE changes more for a given change in velocity at the higher speed.

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## What is a turning point on a potential energy graph?

At a turning point, the potential energy equals the mechanical energy and the kinetic energy is zero, indicating that the direction of the velocity reverses there. The negative of the slope of the potential energy curve, for a particle, equals the one-dimensional component of the conservative force on the particle.