what is a an crusher?

Question

What is a can crusher???
what is a can crusher?why do we use it? does it decrease friction? Is it easier to work with?if it is why????

please give a brief answer.and how do we give more than 20 points for the best answer like if i want to give a 20 points how do you do it?

Thanks alot!!!!

Answer 1

It crushes cans that are to recycled so that they are easier to transport and store.

Answer 2

The only one i know of is used to crush empty soda cans for recycling