Jeopardy

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(No Transcript)
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Formulas
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Demonstrations
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Fun Things
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Practice Problems
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Hard Problems
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Wild Card
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Formulas
Demonstrations
Fun Things
Wild Card
Hard Problems
Practice Problems
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1-100
1 - 100
What is the formula for Circumference?
100
10
1-100A
1 - 100
C 2pr
100
11
1-200
What is the equation for the period?
200
12
1-200A
1 - 100
Either T 1/f or T sec/rot
200
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1-300
What is the equation for frequency?
300
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1-300A
1 - 100
Either f 1/T or f rot/sec
300
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1-400
What is the formula for the velocity?
400
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1-400A
1 - 100

• v C/T
• Or
• v 2 pr/T

400
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1-500
What is the formula for the centripetal force?
500
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1-500A

• F mv2/r
• Or
• F ma

1 - 100
500
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2-100
1 - 100
What direction did you have to push a marble to
get it to move in a circle?
100
20
2-100A
1 - 100
Towards the center of the circle
100
21
2-200
What direction does the ground have to push you
to get you to move in a circle?
200
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2-200A
Towards the center
1 - 100
200
23
2-300
Why does water stay in a bucket when you swing it
over your head?
300
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2-300A
1 - 100
Unbalanced force of the bucket on the water leads
to acceleration towards the center
300
25
2-400
What angle does the velocity and the acceleration
have to be to move in a circle?
400
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2-400A
1 - 100
90 degrees
400
27
2-500
What force causes you to move in a circle in the
gravitron?
500
28
2-500A
1 - 100
The wall pushes you inward
500
29
3-100
A ball is attached to the end of a string. It is
being spun in a horizontal circle in the
direction shown below. If the string were to
break, draw the path of the ball as seen from
above below.
1 - 100
100
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3-100A
1 - 100
Vertically
100
31
3-200
You are charged with the task of making a tumble
buggy travel in a circle that rotates to the
left. The tumble buggy travels at a constant
speed. What direction must you exert a force on
the tumble buggy to make it travel in a circular
path? (Give the direction in relation to the
path of the tumble buggy.)
200
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3-200A
1 - 100
Push it towards the center
200
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3-300
If a child on a tire swing has a frequency of 0.3
Hz. How long will it take the child to go around
in a circle 5 times?
300
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3-300A
1 - 100
16.6 seconds
300
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3-400
The proverbial frog in blender has a frequency
of 0.7 Hz. Find the period.
400
36
3-400A
1 - 100
1.43 seconds
400
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3-500
What causes objects to continue in a straight
line?
500
38
3-500A
1 - 100
Inertia
500
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4-100
A child is spinning a ball at the end of a string
in a circle. The ball completes 12 revolutions
in 6.37 s at the end of a 0.945 m string. What is
the period?
1 - 100
100
40
4-100A
1 - 100
0.53 seconds
100
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4-200
Bobs favorite CD has a scratch 0.12 m from the
center that makes the CD skip 45 times each
minute. What is the speed of the scratch?
200
42
4-200A
1 - 100
0.56 m/s
200
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4-300
A sock stuck to the clothes dryer spins around
the drum once every 2.0 s at a distance of 0.5 m
from the center of the drum. What is the socks
speed?
300
44
4-300A
1 - 100
v 1.57 m/s
300
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4-400
James is seen spinning a yo-yo around in a
horizontal circle. The yo-yo is 0.75 m from
James hand and completes 10 rotations in 15 s.
Find the speed of the yo-yo.
400
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4-400A
1 - 100
v 3.14 m/s
400
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4-500
A circular saw has a circular cutting blade with
a radius of 0.095 m. The blade spins at 3000
revolutions per second. Find the speed a tooth
on the edge of the blade is traveling at.
500
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4-500A
1 - 100
v 1789.8 m/s
500
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5-100
1 - 100
What is the radius of an automobile tire that
turns with a frequency of 11 Hz and has a speed
of 20.0 m/s?
100
50
r 0.29 m
1 - 100
100
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5-200
A cement mixer of radius 2.5 m turns with a
frequency of 0.020 Hz. What is the centripetal
acceleration of a small piece of dried cement
stuck to the inside wall of the mixer?
200
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5-200A
1 - 100
a 0.039 m/s2
200
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5-300
According to the Guinness Book of World Records,
the highest rotary speed ever attained was 2010
m/s. The rotating rod was 15.3 cm long. Assume
the speed quoted was of a 2.0 kg mass at the end
of the rod. Calculate the centripetal force.
300
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5-300A
F 52,811,764.71 N
1 - 100
300
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5-400
In the Olympic hammer-throw event, an athlete
throws a 7.3 kg lead ball attached to a 1.2 m
cable. The athlete swings the ball in a circle
three or four times before letting it go. If the
force exerted by the cable on the hammer is 4430
N, what is the velocity of the ball?
400
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5-400A
1 - 100
v 26.98 m/s
400
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5-500
Freddie swings a 2 kg stone at the end of a thin
rope of length 1.2 m. He tugs mightily, swinging
the stone so fast that the rope is almost
horizontal. If the string exerts a force of 200
N, how fast is the stone moving?
500
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5-500A
1 - 100
v 10.9 m/s
500
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6-100
1 - 100
Give an example of circular motion.
100
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6-100A
1 - 100
Anything moving in a circle
100
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6-200
Why do planets move orbit around the sun?
200
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6-200A
Because of the suns gravitational pull towards
the center
1 - 100
200
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6-300
What is Mr. Bedis favorite team?
300
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6-300A
The giants
1 - 100
300
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6-400
What is Ms. Briggs favorite team?
400
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6-400A
1 - 100
The Patriots
400
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6-500
Why havent the asteroids in the asteroid belt
formed a new planet?
500
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6-500A
1 - 100
Gravitational pull of Jupiter
500
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Final Jeopardy
Category
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What are the planets in order from the sun?
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Contestants Please put down your writing tools
and wait for further instructions.
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Mercury, Venus Earth Mars Jupiter Saturn Uranus
Neptune
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That's all for today. Good luck on your test!
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Daily Double Round 1
Daily Double!!