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### 75 Matching questions

1. what supplies the centripetal force when a car turns in a circle
2. what is the direction of the gravitational forces between Earth and the Sun
3. how does rotation differ from revolution
4. which end of a tapered cup rolls faster when it completes a circle
5. provide a natural example of rotation
6. day
7. what do you conclude about the direction of the net force that keeps the flying pig in uniform circular motion
8. how did the pig overcome air friction
9. earth rotates and revolves through space. earth rotates about the ______, which is an _______ axis. Earth revolves about the ______, which is an ________ axis.
10. how would relative simulated gravity of a rotating space station change if
b)it had twice the angular velocity
11. pi
13. which of the following is a unit of angular velocity
a) degrees/second
c) rpm
d) all of these
e) none of these
14. revolution
15. why are radians used in circular motion calculations
16. how many degrees are in a circle
17. how many radians are in a circle
18. what type of circular motion does rpm apply to
19. what day are we closest to the sun
20. what equations can be us to caluclate angular velocity
21. what is pie nine places past decimal
22. which of these statements is true
d) all of these
23. for uniform circular motion the centripetal force will always be _______ the tension in the string
24. LP
25. percent difference equation
26. what is the direction of Earth's inertia as it travels around the Sun
27. rotation
28. list sources of error for pig lab
29. provide a natural example of revolution
30. equation for theoretical speed of the pig
31. provide a man-made example of revolution
32. diameter
33. year
34. 1rpm=
35. circle
36. equation for computing the speed of the pig
37. what is the greek letter used to represent angular velocity
39. how many degrees are in a radian
40. rpm
41. Ty=
42. tangent
43. what day are we furthest from the sun
44. provide a man-made example of rotation
45. Tx=
47. what are all motion calculations relative to
48. what is the direction of a centrifugal effect
49. axis
50. which has a great angular velocity, a horse near the outside of a carousel or the one near the inside
51. T or F
we only see one side of the moon
52. what is true about our Moon's circular motion
a) rotation>revolution
b) rotation<revolution
c) rotation=revolution
53. angular
54. carousel
55. equation used to calculate the omega and linear velocity of earth's rotation
56. what techniques for measuring r and theta would you recommend for best results
57. how are the wheels of a railroad car designed in order for them to turn at different speeds
58. compare and contrast centripetal force and centrifugal effect and supply examples of each
60. what type(s) of circular motion does a carousel horse 2m from the axis experience
61. which has the greater linear velocity, a horse near the outside of a carousel or one near the inside
62. centripetal
63. what proportionality exists between angular velocity x radius and linear velocity
64. what is the greek letter used to represent degrees or radians
65. what type of circular motion does a person stand on Earth's north pole experience
66. which carousel horse has greater centripetal force
a) outside
b) inside
c) outside=inside
67. what causes the centrifugal effect
68. which type of circular motion for the earth is known as a revolution
69. accelerometer
70. what is the direction of a centripetal force
71. which record has the greatest angular velocity
a) 16rpm
b) 33.3 rpm
c) 45rpm
d) 78rpm
72. centrifugal
73. 1.61km=
74. moonth
75. for circular motion the tension will always be _______ the weight
1. a 1mile
2. b the type of velocity found by dividing theta by seconds
3. c a merry-go-round
4. d v=âˆšrg
5. e v=d/t=2(pi)(r)/t
7. g rotation and revolution
8. h the outside horse
9. i year
10. j omega= theta/seconds or rad/seconds
11. k The direction of the net force is in a radial direction towards the center/centripetal
12. l both rotation and revolution
13. m 3.141592654
14. n centripetal force and tangential inertia
15. o T
16. p 360
17. q the distance across a circle
18. r spinning with axis inside a system
19. s Earth Year (365.25days)
20. t mg
21. u omega=theta/t
v=omega(r)
22. v I used the tangent equation and derived for theta. I used the theta that I found and plugged it into the sin equation to find the opposite side, then I used the theory of similar triangles and lasers to find the radius.
24. x time taken for Moon to orbit Earth (29.5days)
25. y outward
26. z the direction of a planet's momentum while in orbit
27. aa a radian is an angle measure equal to a radius around a circle
28. ab direct
29. ac -timing not precise
-didn't find the exact point at which the hypotenuse reaches the other leg of the triangle with the laser
31. ae centrifugal effect is a center fleeing tendency of an object to fly away from center, centripetal is the opposite. It is a center seeking force. example of centrifugal effect is in a car when tangential inertia and a centripetal force are acting upon an object it creates the centrifugal effect in which if you turn left the passenger will scoot towards the door. An example of centripetal force is when you spin a can on a string that enforces it to stay in circular motion.
32. af 6.28
33. ag a device that measures acceleration
34. ah the wide rim
35. ai the have the same
36. aj half of a diameter
37. ak 57.3
38. al an apparent center fleeing effect
39. am all of these
40. an angle measure equal to length of radius around the circumference of a circle (57.3 degrees)
42. ap throwing a football (the spiral)
43. aq tangent
44. ar less than
45. as Merry-Go-Round
46. at omega
47. au the direction of gravitational pull of sun on the earth
48. av acronym for revolutions per minute (equal to .105 rad/s)
49. aw 360 degrees of 6.28 radians
50. ax d)all of these
51. ay January 3
52. az d)78rpm
53. ba (o-e)/e (100)
54. bb a straight line around which circular motion takes place
55. bc theta
56. bd the coefficient resulting from the circumference of a circle being divided by its diameter
57. be rotation=revolution
58. bf a)2xa
b)4xa
c)8xa
59. bg Earth Day (24hours)
60. bh greater than
61. bi rotation
62. bj one earth rotation equal to 24 hours or 86,400 seconds