Vocabulary: Lever a bar or tool that pivots around a point and reduces the amount of force necessary to move an object Fulcrum the point on which a lever rotates Inclined Plane a ramp that is at an angle to a force such as gravity Wheel a special type of lever that rotates around an axle Axle the fulcrum of a wheel Pulley a special form of a wheel used to reduce friction and help lift heavy objects using a rope Gear a wheel with teeth that helps to transfer motion of power Mechanical advantage the advantage one gains from using a machine Force mass of an object multiplied by the acceleration on it Weight mass of an object multiplied by the acceleration of gravity on it Pre-link Preparation: If possible, have several examples of simple machines that the students can manipulate.
(Lever a bar or tool; pivots; around a point) (a ramp; is; at an angle to a force such as gravity Wheel) (Lever a bar or tool; reduces; the amount of force necessary) (a special type of lever; rotates; L:around an axle; the fulcrum of a wheel) (teeth; helps; to transfer motion of power) Context(teeth helps,List([433, 449))):(teeth; helps to transfer; motion of power) (a wheel; used; to reduce friction and help lift heavy objects using a rope Gear a wheel with teeth) (a lever; rotates; Inclined Plane; a ramp that is at an angle to a force such as gravity Wheel a special type of lever; T:Fulcrum the point) (simple machines; can manipulate; the students) (an object; multiplied; by the acceleration of gravity on it) (an object; multiplied; by the acceleration on it)
teeth helps,List([433, 449))
Lever a bar or tool a ramp Lever a bar or tool a special type of lever teeth teeth a wheel a lever simple machines an object an object
pivots is reduces rotates helps helps to transfer used rotates can manipulate multiplied multiplied
around a point
at an angle to a force such as gravity Wheel
the amount of force necessary
L:around an axle the fulcrum of a wheel
to transfer motion of power
motion of power
to reduce friction and help lift heavy objects using a rope Gear a wheel with teeth
Inclined Plane a ramp that is at an angle to a force such as gravity Wheel a special type of lever T:Fulcrum the point
the students
by the acceleration of gravity on it
by the acceleration on it