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40 Cards in this Set

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