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.
"What are the undesirable and unwanted effects in the medium?
Friction caused by the movement of cams, cranks and pistons create heat in an engine. The heat from the engine is used to warm radiator water which then is used in the car's heater.
Gravity, velocity, and friction?
The purpose of adding oil to a car i to lubricate the engine. if the engine is not lubricated there will be much more friction between gears and friction generates heat. because energy is needed to create heat that energy is taken away from the energy that would be propelling the car forward. this causes the efficiency yo drop.
yes
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.
No You need friction to Walk, So the Answer Is False
friction in machines is undesirable becouse becouse the materials used to make them are always in griding form. ALLY S. MUBA-ngarambe
Heat, in some cases. The wearing away of objects.
When one wants things to slide, move, or turn easily.
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.
Friction
Heat.
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 )
Friction from the air or wind resistance. Rolling friction of the tires and friction within the engine, transmission, and differential.
oil in a car's engine reduces viscous friction and wear
Yes. Ideally, it's fluid friction.