The mechanical device that is define as simplestmechanism that provide mechanical advantage thatchanges the direction or a magnitude of a force.
PULLEYIt is a simplemachine that usesgrooved wheelsand a rope toraise, lower ormove a load.
PULLEYThere are twoparts to apulley, the wheeland the rope. The load and theforce move inoppositedirections.As the rope ispulled down, theflag goes up.
LEVER A lever is a stiff bar that rests on a support called a fulcrum which lifts or moves loads. It has two parts, the bar and the fulcrum. The longer the lever is, the less force will be needed to move the load
Wheel and axle A wheel with a rod, called an axle, through its center lifts or moves loads. A wheel and axle is made from a wheel that turns on a center post. The larger the wheel is, the less force will be needed to move the load.
SCREW It is an inclined plane wrapped around a pole which holds things together or lifts materials. The force and the load move in the same direction, as the force pushes down on the screw, it goes down into the wood.
WEDGE is an inclined plane comes together ending in a sharp edge, which cuts material apart. it may be used to lift or pry apart heavy objects.
INCLINED PLANE An inclined plane is a slanting surface connecting a lower level to a higher level. Its example is a ramp.Reference:http://www.beaconlearningcenter.com/weblessons/simplemachines/machines002.htm