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MADYSON

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by

Madyson Johnson

on 13 November 2012

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Transcript of MADYSON

A SIMPLE MACHINE IS A MACHINE THAT DOES WOEK USING ONE MOVEMENT LEVERS INCLINED PLANES WEDGES A SCREW IS AN INCLINED PLANE WRAPPED AROUND A CYLINDER. WHEN YOU TURN A SCREW, THE SCREW THREADS CHANGE THE INPUT FORCE TO THE OUPUT FORCE. THE OUTPUT FORCE PULLS THE SCREW INTO THE MATERIAL A LEVER IS A SIMPLE MACHINE THAT IS MADE UP OF
A BAR THAT PIVOTS , OR ROTATES, ABOUT A FIXED POINT WHEEL AND AXLE AN INCLINED PLANE IS A SLOPED SURFACE. A WEDGE IS A SLOPED SURFACE THAT MOVES

A WEDGE IS LIKE AN INCLINED PLANE BUT WITH ONE OR TWO SLOPED SIDES. SCREWS SIMPLE MACHINES THERE ARE THREE TYPES OF LEVERS FIRST CLASS LEVERS
I FIRST CLASS LEVER, THE FULCRUM IS BETWEEN THE INPUT FORCE AND OUTPUT FORCE. THE DIRECTION OF THE INPUT FORCE IS ALWAYS DIFFERENT THAN THE DIRECTION OF THE OUTPUT FORCE SECOND CLASS LEVERS
A SECOND CLASS LEVER HAS THE OUTPUT FORCE BETWEEN THE INPUT FORCE AND THE FULCRUM. THE OUTPUT FORCE AND THE INPUT FORCE ACT IN THE SAME DIRECTION. THIRD CLASS LEVERS
THE INPUT FORCE IS BETWEEN THE OUTPUT FORCE A ND THE FULCRUM IN A THIRD CLASS LEVER. THE OUTPUT FORCE IS LESS THAN THE INPUT FORCES, THOUGH BOTH FORCES ACT IN THE SAME DIRECTION .
1ST CLASS : A HAMMER IS A FIRST CLASS LEVER BECAUSE IT IS USED TO PULL A NAIL OUT OF WOOD
2ND CLASS: A WHEELBARROW, NUT CRACKER, AND YOUR FOOT IS A SECOND CLASS LEVER
3RD CLASS:
TWEEZERS, A RAKE, AND A BROOM EXAMPLES A WHEEL AND AXLE IS AN AXLE ATTACHED TO THE CENTER OF A WHEEL AND THEY BOTH ROTATE TO GETHER MECHANICAL ADVANTAGE OF A WHEEL AND AXLE FOR A WHEEL AND AXLE, THE LENGTH OF THE INPUT ARM IS THE RADIUS OF THE WHEEL. THE LENGTH OF THE OUTPUT ARM IS THE RADIUS OF THE AXLE. EQUATION IDEAL MECHANICAL ADVANTAGE = RADIUS OF WHEEL / RADIUS OF AXLE OR, IMA = RWHEEL/ RAXLE EXAMPLES A SCREWDRIVER THE HANDLE IS THE SCREW BECAUSE IT HAS THE LARGE DIAMETER. THE AXLE IS THE SHAFT ATTACHED TO THE HANDLE. BOTH THE HANDLE AND THE SHAFT ROTATE WHEN THE HANDLE TURNS A= WHEEL
B= AXLE
C= OUTPUT FORCE IT TAKES LESS FORCE TO MOVE AN OBJECT UPWARD ALONG AN INCLINED PLANE THAN IT DOES TO LIFT THE OBJECT STRAIGHT UP. IMA= L /H EXAMLES HILLS, STAIRS, RAMP, SLIDE EXAMPLES SOME EXAMPLES ARE YOUR FRONT TEETH, DOOR STOPPERS. EXAMPLES SCREWS, CORK SCREW PULLEYS A PULLEY IS A SIMPLE MACHINE THAT IS A GROOVED WHEEL WITH A ROPE OR A CABLE AROUND IT. THERE ARE THREE TYPES OF PULLEYS.
FIXED PULLEYS: ONLY CHANGES DIRECTION OF THE FORCE .
MOVABLE PULLEYS: DECREACES THE FORCE NEEDED TO LIFT AN OBJECT.
PULLEY SYSTEM:IS A COMBINATION OF FIXED PULLEYS AND MOVABLE PULLEYS EXAMPLES A FLAG BEING BROUGHT UP, IS A FIXED PULLEY A WELL FOR A MOVABLE PULLEY AN EXAMPLE FOR A PULLEY SYSTEM IS
AN AMUSEMENT RIDE LIKE A ROLLER COSTER THANKS FOR WATCHING BY MADYSON JOHNSON http://www.youtube.com/watch?v=l1Fhs8pXGxM
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