A level physics definitions 1

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Across
  1. 3. Distance travelled by a wave front per unit time
  2. 6. Work done per unit time or rate of doing work
  3. 8. Distance in a straight line from a specific point
  4. 11. For an object that is in equilibrium the sum of the total clockwise moments about a point is equal to the sum of the total anticlockwise moments about the same point
  5. 13. The incident angle within a substance which results in a refracted ray having an angle of refraction of 90^o
  6. 15. A system that has no resultant force and no resultant moment acting on it
  7. 17. Mass per unit volume
  8. 20. transfers energy from one point to another without transferring matter
  9. 21. The bending of waves as they pass through a gap or pass by an obstacle
  10. 27. One force x the perpendicular distance between the lines of action of the two forces
  11. 28. Amount by which one vibration lags behind another
  12. 31. A material which has a permanent stretch once the load has been removed
  13. 33. A pair of equal and opposite parallel forces acting on a body, but not along teh same line, causing the body to turn about a pivot
  14. 37. Oscillations of particles are parallel to the direction of wave travel about an equilibrium position
  15. 41. The greatest amount that a material can be stretched and still return to its original length
  16. 42. A point on a stationary wave which has the maximum amplitude because the incident and reflected waves interfere constructively at that point
  17. 46. If body A exerts a force on body B then body B exerts an equal but opposite force on body A
  18. 47. A moving object on which the only force acting is its weight
  19. 48. An object remains at rest or continues with constant velocity unless acted upon by a resultant force
  20. 49. Produced when two waves have the same speed, the same wavelength and frequency, and approximately the same amplitude
  21. 50. An object's acceleration is directly proportional to the resultant force acting on the object
  22. 51. Sources which have the same frequency and have a constant phase angle
Down
  1. 1. Energy cannot be created or destroyed. It can only be changed from one form to another
  2. 2. the smallest non-zero reading that can be measured
  3. 4. Useful output power over input power
  4. 5. Light of a single specific wavelength
  5. 7. Change in distance per unit time
  6. 9. Oscillations of particles are perpendicular to the direction of wave travel about an equilibrium position
  7. 10. A quantity which has direction as well as size
  8. 12. Force multiplied by perpendicular distance from the point to the line of action of the force
  9. 14. A material which breaks soon after reaching its elastic limit
  10. 16. Distance between 2 consecutive points that are in phase
  11. 18. Two points in the medium that are moving in the same direction and change direction at the same instant
  12. 19. Maxiumum velocity of an object achieved when there is no resultant force acting on a falling body
  13. 22. A material which returns to its original length after it has been stretched
  14. 23. The change of energy of an object is equal to the net work done on the object
  15. 24. A point on a stationary wave which has zero amplitude because the incident and reflected waves interfere destructively at that point
  16. 25. Occurs when the angle of incidence within the more dense medium is greater than the critical angle
  17. 26. The overall or net effect of all the forces on an object
  18. 29. Force applied x displacement in the direction of the force
  19. 30. The stretching force per unit extension
  20. 32. The point on the force versus extension graph just before the initial straight line starts to bend
  21. 34. Force of gravity on a mass of 1 kilogram
  22. 35. Velocity change per unit time
  23. 36. One point in the medium moves from its equilibrium position to one extreme to the other extreme and back to the equilibrium position
  24. 38. Maximum displacement of a vibrating point in the medium from the mean position
  25. 39. The point through which a single force on the body does not cause the body to turn
  26. 40. Change in displacement per unit time
  27. 43. Causes all the measurements to be either slightly bigger or slightly smaller than the true value
  28. 44. A material which stretches a lot after its elastic limit has been exceeded
  29. 45. The number of cycles of vibration in 1 second