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Ice skatingIn any electric motor. The friction causes the motor to heat up and waste energy.
by lubricating it by grease
Some of the good effects of friction are also the bad effects.Good effects:Stops or immobilises objects including cars, trucks and humans from sliding down a slope;Allows humans to walk - pushing off from the back foot and not falling over (think about walking on ice or worse, running on ice);Allows objects to remain where they are ie remain at rest, to be leant on;...Bad effects:Causes the production of heat between surfaces when the objects move eg car tyres and brakes heat up due to friction. Engines have to be oiled to reduce the friction of the moving parts. If the engine runs out of oil then the motor will seize due to friction (did that once - new engine required);Friction causes wear on surfaces that slide on one another - even our shoes wear out due to friction with the ground;Friction with air causes air craft, rockets and meteors to heat;...
Technically, you can make a motor without knowing any physics. However, to understand a motor you will need to know many aspects of physics, from friction, to gas laws, and many others.
fluid frictionMotor oil replaces sliding friction with fluid friction.Motor oil is used as a lubricant and replaces the sliding friction to create a type of friction known as fluid friction.
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Friction is present at the motor shaft and also in various parts of the load. The friction torque is equivalent value of various friction torques referred to the motor shaft.
Ice skatingIn any electric motor. The friction causes the motor to heat up and waste energy.
there could be friction inside the motor. there is friction on the wheels of the scooter and the ground. there is air friction when you move on a scooter.
That is a lubricant, specially an oil for motor vehicles
whic is your problem with the sliding door? I have a old sil 99 and I need to change all completely motor and mechanism, I got in a yonke here on Mexico.
Friction
by lubricating it by grease
No, it has a sliding nozzle turbocharger not a wastegate.
Each sliding door has their own motor. Disconnect the wiring to the little motor inside the door you want disabled.
what you do is you go and get your wife to do it for you or go out and buy a car and tell your wife that you did it