It was a man who would not know
No, rubbing your hands together will not set them on fire. Friction between your hands generates heat, but it is not enough to ignite them.
By rubbing 2 pieces of wood together which then made a fire.
by rubbing two stones together
Yes, people in prehistory invented this kind of lighting a fire. Rubbing two dry sticks together makes heat and if you are patient enough it will make fire.
The friction caused by rubbing the sticks together causes heat causes the fire
YES
Examples of two objects that rub together include rubbing a balloon against fabric to create static electricity or rubbing two sticks together to start a fire.
stick
Quartz!
Using a fire starter such as matches, a lighter, or flint and steel is a more reliable and efficient way to start a fire than rubbing two sticks together. You can also use kindling or fire starter cubes to help ignite the fire more easily.
The mineral that can be used to create fire through rubbing pieces together is flint. When flint is struck against steel, such as in a flint and steel fire starter kit, it creates sparks that can ignite tinder.
Flint, a hard, sedimentary cryptocrystalline form of the mineral quartz can create a fire by producing sparks when rubbed together when wet.