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68 Matching questions

  1. W=mg
  2. contact force
  3. vector
  4. free body diagram
  5. buoyant force and the weight
  6. force of friction (f)
  7. downward
  8. floats
  9. Assumptions with Newton's Laws
  10. mass
  11. Pascal's Principle
  12. fun fact
  13. floor
  14. Newton's Third Law of Motion
  15. constant
  16. kg
  17. conculsions of the force table demo
  18. 1st law implications
  19. kinetic friction
  20. buoyant force
  21. same
  22. apparent weight
  23. weight
  24. 1. Strong nuclear force
    2. Electromagnetic force
    3. Weak nuclear force
    4. Gravity
  25. Newton's First Law of Motion: Law of Inertia
  26. newtons
  27. static friction
  28. weak nuclear force
  29. pressure
  30. NO
  31. tension
  32. Archimedes Principal
  33. hydraulics
  34. strong nuclear force
  35. classical mechanics
  36. downward, downward
  37. greater
  38. sinks
  39. electromagnetic force
  40. equilibrium
  41. force
  42. surface imperfections and intermolecular forces
  43. net force
  44. universal; location
  45. force pump
  46. normal force
  47. inclined planes
  48. gravity
  49. static equilibrium
  50. inertia
  51. Newton's Second Law of Motion
  52. hydrostatics
  53. geometry
  54. pressure and depth
  55. floating object
  56. scalar
  57. 1.surface material
    2. normal force of each surface on the other
  58. upward
  59. fluid
  60. friction
  61. independent
  62. Weight down and Drag/Air Resistance up
  63. atmospheric pressure
  64. dynamic equilibrium
  65. field force
  66. types
  67. terminal velocity
  68. 0
  1. a a force pushing against a specific area of a surface. (force/area)
  2. b objects don't accelerate downward forever - at some point their velocity becomes _____________.
  3. c the force exerted by a fluid depends on the height of fluid above it; the deeper the object, the more pressure.
  4. d The direction of the f is opposite the direction of motion
    Friction is proportional to the normal n
    f = µ n (fyi 0 < μ < 1)
  5. e When you apply a force to a confined fluid (a closed system), that pressure is applied equally to all parts of the fluid
  6. f SI units for inertia are _____
  7. g the tendency of an object to continue in its original motion (or resist change in motion)
  8. h mass is ____________; weight depends upon the ___________.
  9. i non-moving fluids (ex. pressure, floating)
  10. j a human's terminal velocity is about 150 mph; an ant's is so low that it can fall far and not get hurt.
  11. k force is a __________ quantity.
  12. l a gas or liquid (both flow)
  13. m If the object is less dense than the fluid,
    the object experiences a net _____________ force
  14. n 1. Space objects will move forever once set in motion.
    2. Friction and air resistance are the net forces that usually slow objects.
  15. o If the object is more dense than the fluid:
    The net force is ______________, so
    The object accelerates _________________
  16. p Whether an object sinks or floats depends on the .........
  17. q force of surface on object
    1.Perpendicular to surface
    2. Acts opposite to gravity
  18. r *Set the x-axis along the incline and y-axis perpendicular to the incline
    *Normal points along y-axis
    *Weight points straight down (break into components)
    *Friction acts along x-axis
  19. s The µs and µk are _____________ of the area of contact
  20. t the tension on a rope is the __________ at all points on the rope.
  21. u force on a rope
  22. v the gravitational pull on an object; always points straight down
  23. w acts when the object is in motion; f is constant while in motion
  24. x force units are measured in ____________
  25. y very short range and very weak; responsible for radioactive decay.
  26. z a push or pull
  27. aa resistance to motion
  28. ab acts to keep the object from moving; if Fa increases, so does ƒs
  29. ac touching
  30. ad the sum of all forces on an object
  31. ae If ΣF (net force) = 0, then there is
    _______ ACCELERATION.
  32. af What are the four fundamental forces of nature (field)?
  33. ag constant speed
  34. ah describes the relationship between the motion of objects in our everyday world and the forces acting on them
  35. ai your weight in water
    (it's less than your weight in air because FB pushes upward)
  36. aj always attractive, and acts between all matter in the Universe; weak, but very long ranged; it's the dominant force in the universe for shaping galaxies and stars.
  37. ak 1.Balancing forces involves vector addition.
    2.The sum of the forces involves considering x- and y-direction forces.
    3.Objects in equilibrium have their forces balanced in both x- and y- directions.
  38. al weight equation
  39. am __________ is a measure of inertia
  40. an caused by 100 km of air above us
  41. ao strongest force; attractive force that holds the nuclei of atoms together.
  42. ap Means ΣF = 0
    there is no acceleration.
    (there must be no net torque too)
  43. aq an object at rest stays at rest and object in motion stays in motion unless acted upon by a net external force.
  44. ar objects accelerating ___________ seem lighter.
  45. as static friction (fs) is ___________ than kinetic friction(fk)
  46. at Objects behave as particles
    Masses of strings are negligible
    Interested only in the forces acting on the object
    (neglect reaction forces)
  47. au *The object is in static equilibrium
    *The upward buoyant force is balanced by the downward force of gravity
  48. av µ depends on the _________ of surfaces in contact
  49. aw factors of friction
  50. ax 1. Every action has an equal and opposite reaction
    2. Forces always occur in pairs
    3. Action and reaction forces must occur on 2 separate objects
    4. Equal in magnitude but opposite in direction
  51. ay If an object's weight < buoyant force, then it _______.
  52. az If an object's weight > buoyant force, then it ________.
  53. ba inertia is a ___________ quantity
  54. bb an object's terminal velocity depends on the object's _____________.
  55. bc ________ scales display the normal force; they are they are the same when a=0.
  56. bd gravity, charges, magnets
  57. be falling objects have 2 forces on them: What are they?
  58. bf Pressure is transferred through a fluid.
    An applied small Force on a small Area transmits a big Force on a big Area.
    Ex: car brakes, car lift
  59. bg a drawing showing all forces on an object
  60. bh acts upward on an object in a fluid making an object feel lighter.
  61. bi When the upward Fair resistance = the downward Fgravity, the Fnet = ____.
  62. bj friction is caused by......
  63. bk constant velocity; a=0
  64. bl not moving; a=0
  65. bm F=ma
    If a constant force is applied to an object,
    it will ACCELERATE
  66. bn long-ranged but weak; attractive or repulsive force between objects carrying electrical charge.
  67. bo moves fluid by changing the pressure in the fluid
  68. bp The buoyant force on an object equals the weight of water displaced by the object.