how do machines make work easier?
In one sentenance
Machines make work easier by reducing manual labor, increasing efficiency, and performing tasks that are difficult or impossible for humans to do.
How does changing the position of a fulcrum change the effort needed to lift an object?
In one sentance
Changing the position of a fulcrum can either increase or decrease the effort needed to lift an object, depending on whether the fulcrum is closer to the object or closer to the effort being applied.
How do you calculate the amount of work done when using a lever?
In one sentence