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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.