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45 Cards in this Set
- Front
- Back
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Lever
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simple machine made up of a rigid bar or plank that rotates on a fixed object called a pivot or fulcrum
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Pulley
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simple machine made up of a wire, rope, or cable moving on a grooved wheel; may be made up of one or many wheels; can be fixed in place or movable
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Inclined Plane
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simple machine made up of a flat surface, such as a board, at an angle to another flat surface, such as the ground or table top; ramp
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Wedge
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simple machine that looks like an inclined plane, but is forced into an object
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Screw
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simple machine that consists of a cylinder with a groove cut in a spiral on the outside
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Machine
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something that reduces the amount of effort or work we exert or to increase our ability to lift or move objects
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Simple Machines
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machines that enable us to use less mechanical effort to move objects
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Simple Machine Families (2)
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simple machines belong to two families, the inclined plane family and lever family
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6 Types of Simple Machines
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wedge, ramp, screw, lever, wheel, axle and pulley
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Groupings of Simple Machines
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inclined plane family- wedge, ramp and screw. Lever family- lever, wheel and axle, pulley
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Ramp
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helps move heavy object more easily by using less force, have to apply the force over a greater distance
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Friction
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the resistance produced by rubbing two objects together
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Wheel and Axle
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simple machine made up of two wheels of different diameters that turn together; a longer motion on the wheel produces a shorter but more powerful motion at the axle
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Gear
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pair of wheels with teeth that interlink; when they rotate together, one gearwheel transfers turning motion and force to the other
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Crank
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handle of a machine that is connected at right angles to an axle, used to transmit motion
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Fixed Pulley
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a secure pulley that is immovable and securely in position
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Same
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when something is equivalent or identical to something else
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Moveable Pulley
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when the load moves in the same direction as the applied force
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Less Force
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smaller amount or proportion of than the original force
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Greater Distance
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when the distance has been increased from the original distance
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Complex/Compound Machine
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combining more than one simple machine
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Compression
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the reduction in volume and increase of pressure of the air
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Distance
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the amount of space between two things, points, lines etc.
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Efficiency
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is a measure of how well a machine or device uses energy
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Energy
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the ability for vigorous activity; available power
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Force
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the amount of pressure that is put on something or the physical power or strength possessed by someone
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Friction
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resistance produced by rubbing two objects together
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Fulcrum
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the support of balance point of a simple machine
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Gear
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pair of wheels with teeth that interlink; when they rotate together, one gearwheel transfers turning motion and force to the other
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Gravity
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the force of attraction that pulls everything downward (or to the core of the earth)
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Hydraulic
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system that uses a liquid under pressure to move loads; device that uses liquids in a confined space to transfer forces; works according to Pascal’s law
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Incline/Decline Plane
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simple machine made up of a flat surface, such as a board, at an angle to another flat surface, such as the ground or table top; ramp
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Input force
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the force applied to the machine by you
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Kenetic Energy
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the energy of motion of particles
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1st Class Lever
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where the fulcrum is in the middle
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2nd Class Lever
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where the load is in the middle
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3rd Class Lever
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where the effort is in the middle
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Mechanical Advantage (MA)
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amount of force that is multiplied by the machine; the output force divided by the input force
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Potential Energy
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stored energy
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Pneumatic
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system that uses air pressure to move loads
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Pressure
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the measure of the force acting perpendicular to a unit area
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Output Force
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the force applied to the machine by the load
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Weight
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the mass of an object
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Work
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what is done when a force acts on an object to make that object move or the effort exerted over a certain distance
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Wheel and Axle
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simple machine made up of two wheels of different diameters that turn together; a longer motion on the wheel produces a shorter but more powerful motion at the axle
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