CRANKS - LUIS DE JUAN MARTIN

In this unit of the simple machines we have also seen the cranks which are formed by a handle and a hook and , did you know that when the distance between this handle and the hook is bigger the effort you made is less ? Interesting no? Well if you want to know some uses of the cranks ( I say one to you : to open and close awnings! ) click here and watch how you repare a bike using a crank!