Glossary Flashcards
Effort
Force applied to a lever to overcome the load
First class lever
lever with effort and loads located at each end and fulcrum in the centre
Force multiplier
machine that increases the force applied for a task such as a first class lever
Fulcrum
Point about which a lever pivots
Lever
Simple machine consisting of a rigid rod that pivots about a point
Load
force that a lever is used to overcome
mechanical advantage
ration of a load force to the effort force used by a machine
second class lever
lever with the fulcrum located at one end, the effort at the other and load in the center
simple machine
a device that makes work easier by changing the size or direction of force
speed multiplier
machine that requires a small movement of an effort to produce a large movement of a load such as a third class lever
third class lever
lever with the fulcrum located at one end with the load at the other and the effort at the centre
inclined plane
a simple machine that reduces the effort needed to lift a load by increasing the distance it acts
pitch
distance between adjacent threads on a screw
ramp
an inclined plane used to help life an object
screw
a spiral shaped inclined plane
wedge
a double inclined plane such as a knife or axe
axle
shaft on which a wheel rotates
block and tackle
a system of two or more pulleys using rope or cable to lift heavy objects
driven gear
the gear that receives force from a driving gear
driving gear
the gear that supplies force to another gear
gear ratio
ration of the number of teeth on the driving gear and the number of teeth on the driven gear
gear train
a system of interconnected gears
gears
a wheel with teeth used to turn another gear wheel
pulley
a wheel with a groove over which a rope or cable can slide used to change the direction of a force
rim
outer edge of a wheel
sprocket
a toothed wheel used to link onto a chain on a bike
wheel
type of lever with an axle acting as its fulcrum
