Works and Machines Questions page 80

1) Doing work is using a force to move an object. A Machine is anything which makes it easier to do work.
2) We are doing work we are pushing a mower cleaning our teeth cycling because these cause force, but we are not doing work when we are reading this page because it dosnt need force.
3) We must eat to keep working because we need the energy.
4) Spanners, pliers and canoppeners are all machienes because it makes work easier.
5) Levers, pullies, ropes, incline Plane, weage, are all simple machines.