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In mechanical systems, changes in thermal energy are generally caused by the presence of friction. Work done by friction reduces the mechanical energies present (potential and kinetic) and introduces thermal energy, or heat. Consider a system that consists of a block sliding across a rough surface which has a coefficient of kinetic friction of m = 0.2. Previously, we would have just stated that the work done by friction on the block brings the block to a rest. But where did that energy go? It needs to be accounted for. The block's mechanical energy became thermal energy, evidenced by the increases in the temperature of its lower surface. (This effect can easily be shown by rubbing your hands rapidly across each other. As you rub, the inner surfaces of your hands get warmer - KE being transferred to TE.) This is still not the entire story, since some of the frictional heat was also absorbed by the table's surface - but we are getting closer to reality.

If we now assume that the entire work done by friction can be accounted for by the increase in the temperature of the block, then we can set up the following equation.

Wdone by friction + DTE = 0
fs cos q = - ( TEf - TEo )
fs cos 180º = - TEf
- fs = - TEf
(mh)s = mc DT
mhs = mc (Tf - To)
and we can solve for either the final temperature or the specific heat.

Revving to over 18,000 RPM a modern Formula One engine will consume a phenomenal 650 litres of air every second, with race fuel consumption typically around the 75 l/100 km (4 mpg) mark. Revving at such massive speeds equates to an accelerative force on the pistons of nearly 9000 times gravity. Unsurprisingly, engine failure remains one of the most common causes of retirement in races.

i dont even know if i shoud bother spealing on why you cant have a reglar car rev at 20'000rpms

The funny thing is, if you ever met Vaughn, or been in a discussioin with him as I and a few other original MX-3 community people on this UBB have, you would know that that is something, that, if possible, Vaughn would have already tried it.

Originally posted by guyaverage:
Someone was ragging on the S2000 because it had its HP peak at 8300 rpm and I said that Honda designed it for that rpm therefore wasnt a problem. I never suggested unlimited redlines and I have yet to hear about hoards of S2000 owners bringing their cars back to Honda with broken rods, cranks and pistons.

What impresses me is when the torque is of a higher number than the HP rating, for instance the Nissan SER is rated something like 165 HP and 175 ft.lbs torque.

I don't know very many people who would take a FWD car over a RWD car