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Going in Circles Test Prep - 30 questions or less Flashcards | StudBud
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Going in Circles Test Prep - 30 questions or less
Going in Circles Test Prep - 30 questions or less
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Answers
1
An object going in a circle has a period of 4 seconds. Its period in minutes is:
4*60 minutes
4/60 minutes
4/1 minutes
1/4 minutes
2
A pig and a horse are on a merry-go-round. You ride pig (close to the center) and your friend rides horse (at the edge)
You and your friend have the same tangential velocity
You have a larger rotational velocity than your friend
Your friend has a larger tangential velocity than you
You and your friend have the same rotational velocity
3
Swing a pocketwatch 25 times(back-and-forth, bf) in 2minutes. Which of these is a correct expression for the frequency?
25/2 bf/min
2*25 bf/min
2/25 bf/min
25*2 bf/min
4
A 2000kg car travels at 3.0m/sec. A 1500kg car travels at 4.0m/sec. What's the total momentum of this set of two cars?
12000 N
6000 N
12000 kg*m/sec
6000 kg*m/sec
5
7 people are in a line. the length of the line is 5.0 meters. What is the length of the interval between the people?
6/5 meters
7/5 meters
5/7 meters
5/6 meters
6
Which is the correct formula for centripetal force:
Fc= mv
Fc=mac
Fc= mv2/r
Fc=mv/r
7
And speaking of Pi, where is the Pi shrine (yes, this a real thing, you cynics)
My backyard (of course)
The Tech Interactive, San Jose
Computer History Museum, Mountain View
San Francisco Exploratorium
8
A pendulum swings back and forth with a period of 13 seconds. What is its frequency?
0.077 Hertz
0.077 seconds
13 seconds
13 Hertz
9
Someone swings a pocket watch. As the frequency of its swinging is increased, what happens to the period of the motion:
the period decreases
The period also increases
the period stays the same
It depends on whether you're in New York or California
10
Swing a pocketwatch 25 times (back-and-forth) in 2 minutes. Which of these is a correct expression for the period?
25/2 min
25*2 min
2*25 min
2/25 min
11
what is the definition of circumference of a circle?
There is no known answer to this question, in the current universe
it is the area of the circle
it is the length of the perimeter of the circle
It is equal to the diameter of the circle
12
what is the correct relationship between radius (r) and circumference (c)
c=2pi*r
c=pi/r2
c=pi*r
c=r/2pi
13
Make a line of 8 people, who will go in a circle. Center person is 0. You're the very outside person. Your # is:
8
6
0
7
14
What is the a
c
of an object traveling in a cirlce with a tangential velocity of 13 m/sec and a radius of 1.8m?
93.8 m/sec2
93.8 m/sec
7.2 m/sec2
7.2 m/sec
15
You go in a circle that has a period of 8.0 seconds. Your radius is 4.0 meters. What is your tangential velocity?
3.14 m/sec
1.57 m/sec
0 m/sec
6.28 m/sec
16
Angular velocity means the same thing as:
centripetal acceleration
displacement
rotational speed
angular acceleration
17
Which of these is the correct formula for tangential velocity?
2*pi*r*T
(2*pi*r)/T
Pi*r/T
(2*pi)/T
18
In the equation a
c
=v
2
/r what does "v" stand for?
victory
angular velocity
tangential velocity
rotational speed
19
the units of centripetal force are:
Nc
N
Nc
kg*m/sec2
20
Which is a legimitate unit of Period for something going in a circle?
miles/year
years
rotations
rotations/year
21
what is the momentum of an object with a mass of 5.0 kg going at a velocity of 15 m/sec?
75 kg/sec
75 kg*m/sec
15/5 kg/sec
5/15 kg*m/sec
22
Which is true of a radius and diameter of a circle
Diameter = 2*radius
Diameter = 2*pi*radius
Radius = 2*pi*diameter
Radius= 2*diameter
23
Which is a legitimate unit of frequency for something going in a circle?
rotations/year
miles/year
rotations
years
24
what are the units of centripetal acceleartion?
m*sec2
m2/sec
sec/m2
m/sec2
25
If the frequency of a child swinging on a swing is 3 swings per minute, what is the period of this swinging?
60 seconds/3 swings
1 minute/3 swings
0.33 minutes
20 seconds
26
An object going in a circle has a period of 4 minutes. Its period in seconds is:
4/60 seconds
4*60 seconds
1/4 second
4/1 seconds
27
which is the correct relationship between circumference (c) and diameter (d)
c=pi/2d
c=2pi*d
c=d/2pi
c=pi*d
28
You fly a pig over a meterstick. The pig flies from 10 cm to 96 cm. What is the radius of the circle the pig is flying
0.86 m
86 cm
0.43 m
43 cm
