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Forces
N/A
37
Science
8th Grade
05/20/2011

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Cards

Term
Machine
Definition
Makes a task easier to do
Term
Simple Machines
Definition
Ramps, Wedges, Screws, Levers, Wheels, Gears and Pulleys
Term
Effort
Definition
The force needed to put in to move an object
Term
Speed Multiplier
Definition
A slowly spinning axle turns the rim at a higher speed. Effort is provided by the turning axle and the load is the fast moving rim
Term
Parallel Gears
Definition
If gears are identical then they will both turn at the same speed but in different directions
Term
Gears
Definition
Used to change torque(spinning force) or the direction of rotation
Term
Axle of a doorknob
Definition
Spindle
Term
Speed Multipliers/ Class 3 Levers
Definition

-used to get the load

-fulcrum at one end

-load at other

-effort in middle

Term
Class 1 Lever
Definition
Load and effort on ends and fulcrum in middle
Term
Types Of Gears
Definition
Rack and pinion, idler, worm and bevel
Term
Wedge
Definition
Inclined plane that passes through another object, splitting or slicing it in two
Term
Measure Work
Definition
Work=effort force X distance
Term
Complex machines
Definition
Machines made up og two or more simple machines
Term
Gearing up
Definition
Driven gear is smaller than the driving gear, it will rotate faster: the gears act as a speed multiplier
Term
Gear
Definition
A wheel with identical teeth around its edge
Term
Force Multiplier
Definition
A small effort applied to the rim hs produced a large turning force at it's axle, the force has been multiplied
Term
Axle location
Definition
Centre of a wheel
Term
Class 2 Levers
Definition

Force multipliers

Fulcrum and effort on sides and load in the middle

Term
Screw
Definition
Ramp that spirals around a cylinder
Term
Ramp
Definition
Inclined plane that is used when you need to get a heavy object up to a higher level
Term
Gearing down
Definition
Small driving gear rotates a larger one, but at a slower speed
Term
Driving Gear
Definition
If axle turns
Term
Gear Train
Definition
Set of connected gears
Term
Torque
Definition
Force that causes spin
Term
Rim
Definition
Outside of a wheel
Term
Levers Mechanical Advantage
Definition

M.A=load/effort=

distance of effort from fulcrum/distance of load from fulcrum

Term
Lever
Definition
Any rod, stick or object that is made to turn round a pivot or fulcrum
Term
Mechanical Advantage
Definition
measure how effective a machine is
Term
Principle of Levers 
Definition
effort X distance= load X distance (effort and load from fulcrum)
Term
Force Multiplier
Definition
Put in a small effort and the lever system multiplies it so that you can lift much heavier loads than normal
Term
Calculate M.A
Definition
M.A= load/effort
Term
Work measurement
Definition
Joules
Term
Work
Definition
energy needed to move something over a certain distance
Term
Pulley
Definition
makes job of lifting an object easier 
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