Unit 4 Crossword

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Across
  1. 2. friction found at the boundary between liquids, gases, or both liquid and gas
  2. 5. a simple lifting maching using a wheel on a cylindrical drum or shaft to provide mechanical advantage when lifting objects
  3. 7. a type of force that is inserted into a simple or complex machine
  4. 10. energy as a result of radioactive decay, fusion, or fission of nuclear isotopes
  5. 12. friction between an object that is rotating across a surface and the surface with which the object is rotating
  6. 15. the acceleration of an object being pulled to the center of a much larger object
  7. 20. friction between a surface and an object as the object slides across the surface
  8. 22. ratio of force produced by a machine to the force applied to it, used in assessing the performance of the machine
  9. 24. energy as a result of a flow of electrons
  10. 30. type of simple machine that contains a wedge revolving around a rigid cylinder
  11. 32. the mass of an object and the acceleration with which the object is being pulled
  12. 33. a measure of displacement over time
  13. 34. a prediction of the mechanical advantage for a machine
  14. 36. the resistance of an object to changes in motion as a result of their mass, often compared with momentum
  15. 37. the stoppage of acceleration due to gravity because of air resistance
  16. 39. causes an object to move or change direction, can be measured by mediclorians in the blood
  17. 41. an object being pulled by the lone force of gravity
  18. 43. the shortest distance between two points of reference
  19. 44. a collection of simple machines that work together greatly increasing mechanical advantage
  20. 45. the amount of force exerted over a distance
  21. 46. the sum of opposing or convergent forces
  22. 47. the speed of an object as a summary of the duration of the motion
  23. 48. energy as a result of simple machines
Down
  1. 1. background or reference that is stationary that provides evidence for an object in motion
  2. 3. forces that are equal and opposed
  3. 4. the speed of an object at any one point in time
  4. 6. the measured mechanical advantage that is compared to and calculated with the ideal advantage
  5. 8. much like a wheel and axle, but with the wheel having a set groove
  6. 9. the opposing force to gravity cause by air particles
  7. 11. point of reference used as evidence of an object's distance and displacement
  8. 13. a type of force exerted by a simple of complex machine
  9. 14. type of simple machine involving a rigid bar set on a pivot point like a handle, crank, or wrench
  10. 16. energy of motion
  11. 17. diagram that measures and illustrates an object's motion
  12. 18. the measure of work performed over time
  13. 19. an object with a think end that tapers down to a thin end, is driven into an object to secure or separate other objects
  14. 21. a plane that is set at an incline compared to a horizontal plane
  15. 23. the amount of matter in an object
  16. 25. a measure of work out over work in, presented as a percentage, 100% can never be reached
  17. 26. resistant force of a surface - surface interaction
  18. 27. energy at rest, increase with the height of an object
  19. 28. the time it takes an object to increase or decrease in velocity
  20. 29. friction that causes an object to stay stationary
  21. 31. energy as a result of the movement of particles in a substance, can cause phase changes
  22. 35. measurement between two points of reference
  23. 38. energy as a result of a chemical reaction
  24. 40. forces that are not equal and/or opposed
  25. 42. force that is the result of a mass in motion, often compared with inertia