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It robs energy ... which means you have to buy some gas that never helps

to move the car ... and it produces heat, which has to be dissipated by means

of a whole extra layer of technology that you have to build around the engine.

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Q: Why is friction undesirable in a engine?
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Related questions

What is undesirable?

An example of undesirable friction is when a cyclists falls and his face against pavement that skin on the road. Undesirable friction is something that is not controllable.


Is Friction is always undesirable true or false?

No You need friction to Walk, So the Answer Is False


Why is friction between moving parts of a machine undesirable?

friction in machines is undesirable becouse becouse the materials used to make them are always in griding form. ALLY S. MUBA-ngarambe


A situation where friction is undesirable?

Heat, in some cases. The wearing away of objects.


When friction is undesirable?

When one wants things to slide, move, or turn easily.


When is friction desirable and undesirable in rugby?

Desirable in scrummaging when the two packs form together. Without friction they would slip off which is dangerous. Friction is also desirable when making the tackle. And when sidestepping you need good grip. Undesireable when trying to evade the tackle.


What is a source of heat in an engine?

Friction


What does friction cause in the engine?

Heat.


When is friction un useful?

i wonder if you mean when is friction not useful ? well; it is useful when you require a surface to hold onto another item . such as the clutch and brake components in a car. a clutch depends on the friction of the metal surface of the clutch plate to drag against another surface to disengage the drive mechanism . A brake system needs the friction between fibre brake shoes and metal case to slow down a car-- vehicle . this is useful. however , in some areas of a car there are parts that require very little friction, such as wheel bearing and inlet and exhaust timing valves which control the operation of fuel ignition timing within engine compartment . these component's have a limited amount of friction but depend upon a coolant such as lubrication oil to ease this friction - action . with an increase in thickness -- measurements the clearances will become less and hence the friction will increase to cause excess heat production . this will cause undesirable heat effect, and expansion and wear and quite likely overheating . ( undesirable result of friction )


What knid of friction works on a car as it moves?

Friction from the air or wind resistance. Rolling friction of the tires and friction within the engine, transmission, and differential.


What is an example of viscous Friction?

oil in a car's engine reduces viscous friction and wear


When a car engine running smoothly is friction caused?

Yes. Ideally, it's fluid friction.