"But the fact is that there wouldn't have been enough frictional heat to do the job."

One end is coated with a material that can be ignited by frictional heat generated by striking the match against a suitable surface.

We can withstand the frictional heat generated by entry into thick atmosphere at better than a hundred thousand miles an hour.

The heat created by this friction itself can cause thermal expansion of the rails and projectile, further increasing the frictional heat.

As the plate descends frictional heat is generated between its upper surface and the surrounding mantle.

The fire department later determined that the fire started when a flat tire was dragged across the concrete beam and ignited by the frictional heat.

One would sense the beginnings of frictional heat but no more.

The refined and blended chocolate mass is kept in a liquid state by frictional heat.

Any two surfaces rubbing together produce frictional heat, such as a brake shoe pressing against a brake-drum.