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Simple Machines(any of the basic mechanical devices for applying a force,…
Simple Machines(any of the basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever.)
Pulley
Definition
Pulleys are simple machines that comprises of a wheel on a fixed axle, with a groove along the edges to guide a rope or cable.
Types
Fixed pulleys, Movable pulleys
Mechanism
Pulleys allow you to reverse the direction of your lifting force by pulling down on a rope, lifting your weigh
Applications
Lift loads, Apply forces, Transmit power
IMA
Fixed pulleys: IMA = Load/Effort = 1, Movable pulleys: Load is two times Effort, therefore IMA = 2
Lever
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Types
First, Second, Third class lever
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Applications
Levers make it simple to cut, remove, and lift objects that are tight. By applying a little force over a wider distance at the other end, levers can be used to apply a huge force over a short distance at one end.
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Wheel and Axle
Definition
A wheel and axle consists of an outer ring or cylinder called the wheel and an inner ring or cylinder called the axle.
Mechanism
The wheel and axle uses angular momentum and torque to do work on objects, typically against the force of gravity
Applications
Car tires, Bicycle, Ferris wheel
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Wedge
Definition
A wedge is simply a triangular tool, often made of metal, wood, stone, or plastic
Mechanism
A Wedge is a very shallow sloped triangular shape that can be pushed into a small gap to enlarge it. As the sloped side moves deeper into the crack it levers the gap apart.
Applications
A wedge is used for splitting wood, carving, chiseling
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Inclined Plane
Definition
An inclined plane is a simple machine with no moving parts. It is simply an even sloping surface. It makes it easier for us to move objects to higher or lower surfaces than if we lifted the objects directly upwards.
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Applications
ramp used to load goods into a truck, slides
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Screw
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Mechanism
A screw is a mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force.
Applications
Screws are widely used in threaded fasteners to hold objects together, and in devices such as screw tops for containers, vises, screw jacks and screw presses.
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