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40 Cards in this Set
- Front
- Back
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Speed and direction of the object
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velocity
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Every object exerts a force on anther object
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Gravity
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Action-reaction, to every action force there is an equal and opposite reaction force.
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newton's 3rd law
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Rate of change of velocity
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acceleration
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A net force acting on an object causes t to accelerae in the direction of the force.
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Newton's 2nd law
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Rate of motion
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Speed
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Object at rest and stays at rest, and an object in motion stays in motion unles a net force acts on it.
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newtons 1st law
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Acceleration toward the center o a curve or circle.
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Centripetal acceleration
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Forces hat oppose motion between two surfaces that touch.
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friction
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The flow of electrons
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current
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opposes the flow of electrons
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resistance
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A cloed path the electrons flow
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circuit
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This creates a potential difference and is filed witha paste inside
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dry cell
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This type o crcuit in which all the light bulbs go out if one goes out
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series
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This does not allow heat or electrons to move freely
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insulator
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This machine measures charge
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electroscope
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The area surrouning an electron
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electric field
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The unit used to measure energy
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kilowatt hour
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An electric charge build up
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static electricity
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The region around a magnt where magnetic forces act
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Magnetic field
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material that allows electrons to move easily
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conductor
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The regions of a magnet where magnetic forces opposite
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magnetic poles
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A temporary magnet formed by a coil of wire and a current
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electromagnet
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Material that has no electrical resistance
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super conductor
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Electric current that cycles back and forth from the power source to the outlet
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alternating current
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Electric current the flows in only one dirction through a wire
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direct circuit
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Energy in the form of motion
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kinetic enegy
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stored energy
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Potential energy
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The transfer of energy through motion
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Work
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A law stating tha eergycan change form but cnnot be created or destroyed under ordinary conditions.
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Lawof conservation of energy
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The measure of the amount o work done in a specific amount of time
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Power
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A device that accomplishes work with only one movement
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Simple machine
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A simple machine conisting of a bar that is free to pivote around a fixed point.
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lever
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How do you find mechanical advatage for a lever?
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R/E or Ea/Ra
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a simple machine consisting of a grooved wheel with a rope or chain running along the groove.
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Pulley
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How do you find mechanical advantage for a pulley?
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supporting strings or R/E
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A simple machineconsisting of two different sized wheels that rotate together
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Wheel and axel
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A simple machine consisting of a slpig surface used to raise objects
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Incline plane
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How do you find mechanical advantge for an incline plane?
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EA/RA or R/E
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A combination of two or more smple machines.
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compound machine
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