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26 Cards in this Set
- Front
- Back
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Complex Machines
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Machines made by putting two or more simple machines together
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Crank
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A wheel with a rod attached close to its rim. The rod moves back and forth while the wheel rotates.
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Effort
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A force applied to a machine to produce an action.
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Energy
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The capacity to do work.
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Fixed pulley
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A pulley that stays in place and helps to do the work by changing direction of the load.
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Force
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The push or pull that makes an object move, slow down, or stop.
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Friction
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The resistance a body meets when moving over a surface or through a gas or liquid.
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Fulcrum
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The point on which a lever rests or turns.
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Gear
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Two toothed wheels that intermesh either directly or through a chain.
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Gravity
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The force that pulls objects towards the centre of Earth.
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Inclined Planes
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A sloping surface. A simple machine that can be used to alter the effort and distance involved in doing work.
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Intertia
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The resistance of a moving object to change its speed or direction, and the resistance of stationary objects to being moved.
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Kinetic Energy
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Moving energy.
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Lever
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A rigid beam that rotates around a fixed point, the fulcrum, and changes the direction and strength of a push or a pull.
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Linear Motion
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A movement in a straight line between two points.
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Load
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The mass (weight) of an object to be moved.
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Moving Pulley
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A pulley that is not attached to a fixed position and moves with the load.
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Oscillating Motion
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A back-n-forth movement that goes between two points; to vibrate.
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Potential Energy
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The capacity of a stationary object to do work. Potential energy can be converted to kinetic energy.
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Pulley
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A wheel that is turned by a rope or belt and changes the direction of a force.
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Rack and Pinion
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One wheel, the pinion, meshing with a sliding toothedrack, converting rotary motion to reciprocating motion.
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Rotational Motion
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A movement along a curved path or in a circle.
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Reciprocating Motion
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A movement that goes up and down in a straight line.
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Screw
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A cylinder with an inclined plane wrapped around it.
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Wedge
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A part of a machine with a sloping side that moves to apply force.
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Wheel and Axle
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Rotating machines or devices in which effort applied to one part causes movement to another.
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