Driving, walking, anything that requires you to push against something. If there was no friction, your tires would spin endlessly and your feet would fly out from underneath you (think of walking/driving on ice!)
No, the ideal is without friction.
There are many reasons why friction is an advantage to human motion. Friction helps humans to stop when they need to stop.
Advantage of friction photo
rubbing your hands together produce heat that is friction.
Without friction, some forms of mechanical advantage do not function. In most cases for a mechanical apparatus, a reduction in friction is usually accompanied by an increase in efficiency.
Wear and tear of moving parts would be reduced. Less energy would be needed to run the machine, as there would be less friction to be overcome. A well lubricated machine is more efficient than a neglected machine with unoiled parts.
Mechanical advantage is determined by physical measurement of the input and output forces and takes into account energy loss due to deflection, friction, and wear. The ideal mechanical advantage, meanwhile, is the mechanical advantage of a device with the assumption that its components do not flex, there is no friction, and there is no wear.
if it is an advantage then it can't be bad
is gripping a pipe with a stillson wrench an andvantage or a disadvantage of friction?
In real machines, there is always friction that reduces the efficiency of the machine.This reduces the mechanical advantage because some of the input force has to be used to overcome the force of friction in the machine.To reduce friction in the machine, you could add a lubricant such as oil.
ignoring friction or ideal mechanical advantage
Advantage-we can write. Disadvantage- hard to move objects