Respuesta :

sarhaharris
There are six simple machines: They are A lever, The inclined plane, The wedge, The screw, The wheel and axle, The pulley. 
Bethbear67
A knife is a wedge. Scissors incorporate both a wedge and a screw. The blind is controlled by a pulley.  A cheese grater is a wedge.  This pizza cutter contains a wedge, a wheel, and an axle. A can opener contains four simple machines…a screw, a lever, a wedge, and a wheel and axle.