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# the 6 simple machnes (inclinedplain,wedge,screw,lever,pulley,wedge)

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## sarah dahar

on 7 June 2015

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#### Transcript of the 6 simple machnes (inclinedplain,wedge,screw,lever,pulley,wedge)

SIMPLE MACHINES By Sarah Dahar There are six basic kinds of simple machines: inclined plane
wedge
screw
lever
wheel and axle
pulley Inclined plane Wedge Screw Lever Wheel & Axle Pulley work cited pictures Work Cited Pictures google images An inclined plane is a flat supporting surface which is tilted at an angle, with one end higher than the other.
The way it helps us do work- the inclined plane helps us raise or lower something from one level to a different level also an inclined plane allows you to exert your input force over a longer distance. Therefore making the force you put in (input force) now less than the output force. (Which causes you to do less work.)
To find the M.A. of an inclined plane you use the formula
length of incline height of incline
Some examples of inclined planes are slides, a path leading up a hill, and a ramp. http://www.edinformatics.com/math_science/simple_machines/inclined_plane.htm M.A.=2 M.A.=3 M.A.=4 RW6T5WEJ6DEJY5DETJ JYT http://atlantis.coe.uh.edu/archive/science/science_lessons/scienceles1/plane.htm Science text book A Wedge is two inclined planes with the two bases connected making an isosceles triangle.
The wedge helps us do work by allowing us to put a force which we apply over a large area and then to have the output force come out of the edge or smaller area if your using a knife.
To find the M.A. of a wedge you use the formula side length width
Some examples of wedges are shark teeth, an ax, and pins. http://scienceforkids.kidipede.com/physics/machines/wedge.htm http://iqa.evergreenps.org/science/phy_science/ma.html A screw is an inclined plane that spirals around a pole with a wedge at one end.
The way the screw helps us do work is by making it possible for you to apply your input force over a longer distance which multiplies the output force.
To find the M.A. of a screw you use the formula circumference pitch.
Some examples of screws are cork screw, spiral stairs, and a jar with a lid. http://www.mikids.com/Smachines.htm A lever is a simple machine that consists of a rigid bar that rotates around a fulcrum .
The lever helps us do work by transferring the input force over a longer distance exerting the output force on an object and a lever multiplies the input force.
To find the M.A. of a lever you use the formula effort arm resistance arm.
Some examples of levers are scissors, a see-saw, and pliers. effort Effort Effort A wheel and axle is a large circular wheel attached to a smaller cylinder A wheel and axle is a simple machine that includes two circular objects, one large circular wheel (the wheel) attached to a smaller cylinder (the axle).
How the wheel and axle helps us do work is by
To find the M.A. of a wheel and axle you use this formula- diameter of the wheel diameter of the axle.
Some examples of the wheel and axle are pencil sharpener, fan, and a ferris wheel. A pulley is a wheel that rotates on a frame. A pulley is a wheel that rotates on a frame.
The way a pulleys helps us do work is by changing the amount and direction of the input force.
The M.A. of a fixed pulley is 1. The M.A. of a moveable pulley is 2.
Some examples of pulleys are flagpoles, window blinds ,and rock climber pulleys.
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