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Its answer is very simple that a car uses more petrol when it has to overcome more wind resistance.

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Q: Why does a car use more petrol when it has a load on the roof?
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In terms of friction why does a car use more petrol when it has a load on its roof?

It uses more petrol because of air resistance. Friction pulling the load on the roof which causes the car to use more petrol because of the weight it needs more energy to move around.


Why do A car uses more petrol when it is fitted with a roof rack?

Wind resistance.


Why does a car use more petrol when it has a load?

When the car is loaded, more energy is needed to propel it. A loaded car feels sluggish so you have to press the gas pedal more, so more fuel is used.


What is more efficient diesel or petrol car?

diesel is more efficient


What is a petrol car?

petrol is synonymous to gasoline. so a petrol car is a car that uses gasoline as its source of fuel.


Why would the owner of an electric car want to have a load indicator in his or her car?

The load indicator is a measure of how much current is drawn from the battery. Nore load is more current which means the battery won't last as long, and the driver may run out of power before getting to the destination. The same thing is true of petrol cars, and heavy footed drivers get the same result.


How much is an electric car compared to a petrol car?

It depends which car it is, electrical cars are usually more expensive.


Does a hybrid car need petrol?

a Hybrid car means it uses 2 or more energy ways to get powered. This can be for example: - Petrol, Hydrogen - Electricity, Petrol. - Electricity, Gas. etc etc. So nto all hybrid cars need petrol.


What are the benefits of petrol?

The beneifits of petrol is that it fuels your car and it lets it go many kilometres. Petrol is also a fossil fuel and will be around for the next hundred of years. Also petrol doesn't contain lead, unlike the earlier types of petrol which contained lead and can damage your heath. the benefit of petrol is that it gives fuel to your car so it can work and drive kilometers and more.


What car is best to use electric or petrol?

Petrol


What is the difference between petrol car and disel car?

The petrol one uses petrol, and, wait for it, the diesel one uses diesel!


Does using cold air blowers on a car cause the car to use more water?

Abnormally cold air is harder to generate. It is said that a car will use more petrol and/or water to do this. So yes, using cold air blowers will use a little bit more water and/or petrol