Inclined planes.
it takes force to drag an object up an inclined plane than to lift it vertically. A ramp is an example of an inclined plane.
WEDGES.
LEVERS
first class levers: see saw, pliers, scissors
the force depends on where the fulcrum is located
second class levers: wheelbarrow, nutcrackers
class two levers have force advantage
third class levers: fishing rod, biceps,diving board,tweezers.
class three levers take time/speed advantage
PULLEYS.
fixed pulley
moveable pulley
the mechanical advantage of pulleys depends on the number of ropes joined.
SCREW
