Transcript Jeopardy

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1 - 100
1-100
What is the
formula for
Circumference?
1 - 100
1-100A
C = 2πr
1-200
What is the
equation for the
period?
1 - 100
1-200A
Either T = 1/f
or
T = #sec/#rot
1-300
What is the
equation for
frequency?
1 - 100
1-300A
Either f = 1/T
or
f = #rot/#sec
1-400
What is the formula
for the velocity?
1 - 100
1-400A
v = C/T
Or
v = 2 πr/T
1-500
What is the
formula for the
centripetal
force?
1 - 100
F=
2
mv /r
Or
F = ma
1-500A
1 - 100
2-100
What direction
did you have to
push a marble to
get it to move in
a circle?
1 - 100
2-100A
Towards the
center of the
circle
2-200
What direction
does the ground
have to push you
to get you to
move in a circle?
Towards the
center
1 - 100
2-200A
2-300
Why does water
stay in a bucket
when you swing
it over your
head?
1 - 100
2-300A
Unbalanced force
of the bucket on
the water leads to
acceleration
towards the center
What angle does
the velocity and
the acceleration
have to be to
move in a circle?
2-400
1 - 100
2-400A
90 degrees
2-500
What force
causes you to
move in a circle
in the gravitron?
1 - 100
2-500A
The wall
pushes you
inward
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
3-100
1 - 100
3-100A
Vertically
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.)
3-200
1 - 100
3-200A
Push it towards
the center
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?
3-300
1 - 100
3-300A
16.6 seconds
The proverbial
‘frog in blender’
has a frequency
of 0.7 Hz. Find
the period.
3-400
1 - 100
3-400A
1.43 seconds
3-500
What causes
objects to
continue in a
straight line?
1 - 100
3-500A
Inertia
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
4-100
1 - 100
4-100A
0.53 seconds
Bob’s 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?
4-200
1 - 100
4-200A
0.56 m/s
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 sock’s speed?
4-300
1 - 100
4-300A
v = 1.57 m/s
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.
1 - 100
4-400A
v = 3.14 m/s
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.
4-500
1 - 100
4-500A
v = 1789.8 m/s
1 - 100
5-100
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?
r = 0.29 m
1 - 100
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?
5-200
1 - 100
5-200A
a = 0.039
2
m/s
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.
F = 52,811,764.71 N
1 - 100
5-300A
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?
5-400
1 - 100
5-400A
v = 26.98 m/s
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?
5-500
1 - 100
5-500A
v = 10.9 m/s
6-100
1 - 100
Give an example
of circular
motion.
1 - 100
6-100A
Anything
moving in a
circle
6-200
Why do planets
move orbit
around the sun?
Because of the
sun’s
gravitational
pull towards
the center
1 - 100
6-200A
6-300
What is Mr.
Bedi’s favorite
team?
1 - 100
6-300A
The giants
6-400
What is Ms.
Briggs’ favorite
team?
1 - 100
6-400A
The Patriots
6-500
Why haven’t the
asteroids in the
asteroid belt
formed a new
planet?
1 - 100
6-500A
Gravitational
pull of Jupiter
What are the
planets in order
from the sun?
Mercury, Venus
Earth Mars Jupiter
Saturn Uranus
Neptune