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There are two approaces. One is empirical the other is indepth theoretical microscopic consideration. Empirical - Fa = Applied force , mu = coeff. of friction as per the case i.e. static at the time of starting of motion , dynamic / rolling while in motion. Let alpha = factor deciding conversion of frictional energy into heat energy . h = heat energy solely generated due to friction then h = alpha*mu*F*d where d is distance travelled by keeping F same . Also one fine point is alpha depends on instantaneous temperature and mu on surface roughness. All these values for practical purpose must be determined by experiment.
Detailed microscopic considerations are beyond the scope of this forum !
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We apply brakes on our fast moving carcause of heat generation in this work?
The heat is generated due to friction.
How do we use frictions to generate power and heat?
friction is generated when two objects are rubbing
Does applying brakes on a bike cause friction?
Yes, and the heat generated is the converted momentum of slowing down.
What happen when we rub two blocks of ice?
The heat generated by the friction will cause them to melt.
When is friction generated?
Anytime that the surface of two materials are in contact. There does not have to be motion to have friction.
What energy is it when you rub an object on any object?
Heat - generated by friction.
Why is a spark produced when two stones collide?
When the stones collide, they generate friction which in turn generates heat. The greater the friction, the more heat that is generated.
We apply brakes on our fast moving carcause of heat generation in this work?
The heat is generated due to friction.
What form of heat is generated when one object rubs against another object?
Friction
How do we use frictions to generate power and heat?
friction is generated when two objects are rubbing
Why rubbing your hands make you feel warmer?
The friction generated by your hands creates heat.
Does applying brakes on a bike cause friction?
Yes, and the heat generated is the converted momentum of slowing down.
Why is the energy generated from friction difficult to recover?
It is radiated as heat energy which is quickly dissipated to the surrounding environment.
What happen when we rub two blocks of ice?
The heat generated by the friction will cause them to melt.
Why machines are applied with grease?
It's to reduce friction (and thus heat) generated while the machine's parts are moving.
If you use a hacksaw to cut a piece of metal why do they both become hot?
due to heat generated by friction of two metallic surfaces
What can cause a machine to be less than 100 perecnt efficent?
Friction Heat generated Energy lost in loose links and gears etc.
