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1.1 Simple Machines

QuestionAnswer
A force that produces or tends to produce rotation or torsion Torque: 
The force applied on an object times distance the object travels parallel to the force Work
What is the formula for Work Work = Force · Distance = F · d║
What is the formula for IMA IMA= DE/ Dr
What is the formula for AMA AMA= Fr/Fe
A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second point and turning on a fulcrum at a third. lever
Fulcrum is located between the effort and the resistance forces. First Class Lever
Only class of lever that can have an MA greater than or less than 1. First Class Lever
Fulcrum is located at one end of the lever. Second Class Lever
Always has a mechanical advantage >1. Second Class Lever
Always has a mechanical advantage < 1 Third Class Lever
Fulcrum is located at one end of the lever. Third Class Lever
The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force. Moment
Formula for Moment M = d x F
When the sum of all moments on a lever equals 0, the lever is in rotational equilibrium
The state in which the sum of all the clockwise moments equals the sum of all the counterclockwise moments about a pivot point Rotational Equilibrium
In a machine, the ratio of useful energy output to the total energy input, or the percentage of the work input that is converted to work output Efficiency
The ratio of AMA to IMA % efficiency = (AMA/IMA)*100
A wheel is a lever arm fixed to a shaft, called an axle. Wheel and Axle
a lever consisting of a wheel with a groove in its rim that is used to change the direction and magnitude of a force exerted by a rope or cable. Pulley
First class lever with an IMA of 1 - Changes the direction of force Fixed Pulley
- Second class lever with an IMA of 2 - Force directions stay constant Movable Pulley
Fixed and movable pulleys in combination provide mechanical advantage and a change of direction for effort force. a block and tackle
Created by: jkennedy2
 

 



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