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Physics

  1. Mass
    Amount of matter in an object
  2. Volume
    Amount of space an object takes up
  3. Density
    Amount of mass in a certain volume
  4. Floatation
    A substance floats on a liquid if it is less dense than the liquid
  5. Speed
    Distance it travels in a certain amount if time
  6. Velocity
    Speed of an object in a certain direction
  7. Acceleration
    Change in it's speed divided by the time taken for this change in speed
  8. Force
    Causes an object to move
  9. Friction
    The force that opposes the motion of an object when in contact with another object
  10. Lubrication
    Reduces the friction between two objects in contact
  11. Hooke's law
    The extension of a spring is directly proportional to the force causing the extension
  12. Moment of force
    Force applied multiply by the distance from the fulcrum
  13. Lever
    A rigid body that turns around a fixed point called the fulcrum
  14. Centre of gravity
    The point in the object at which all the weight seems to act on
  15. Stable equilibrium
    The object will always return to it's same position
  16. Unstable equilibrium
    The object will not return to it's same position
  17. Pressure
    The amount of force acting down on a fixed area
  18. Watt
    • The unit of power
    • represents joules per second
  19. Work done
    • force×distance
    • When a force causes and object to move
  20. Power
    • The rate at which work is done
    • workdone/time
  21. Energy
    The ability to do work
  22. Principle of conservation of energy
    Energy is neither created or destroyed but is converted from one  form into another
  23. Latent heat
    Occurs when there is a change in state but not in temperature
  24. Radiation
    Transfer of heat by electromagnetic waves and does not require a medium
  25. Luminous
    Objects that make their own light
  26. Non-luminous
    • Don't make their own light
    • light reflects of non-luminous sources
  27. Dispersion
    Separation of light into it's different colours
  28. Spectrum
    Of a white light is the 7 colours as it passes from one medium into another
  29. Sound
    Produced by vibrations
  30. Echo
    reflection of sound
  31. Magnetic force
    The force of attraction of repulsion between two magnets
  32. A magnetic field
    The area around a magnet in which a magnetic force is present
  33. Insulator
    A material that does not allow charge to flow through it
  34. Conductor
    A material that allows charge to flow through it
  35. Direct Current
    flows in only one direction
  36. Alternating Current
    Changes direction continuously
  37. A fuse
    Used to limit the size of a current flowing through a circuit
  38. A diode
    Allows electric current to flow in only one direction
  39. Light Emitting diode (Led)
    • Gives out light when current passes through it
    • It only allows current to flow through it in one direction
  40. Light dependant resistor (LDR)
    Allows the resistance to change depending on the light intensity falling on it.
Author
cat126
ID
340471
Card Set
Physics
Description
words
Updated

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