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Finishing up torque Flashcards | StudBud
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Finishing up torque
Finishing up torque
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Answers
1
Is it possible to be rotating and be in equilibrium?
no, any rotation is unbalanced
yes, if it is rotating at a constant rate (rad/s)
2
In the Boom lab, what trig function did you use to determine the force of tension?
none of these is correct
sine
tangent
cosine
3
When is torque clockwise = torque counter clockwise?
when the system is in equilibrium
always
never
when the system is rotating at a constant rate
4
torque is an application of which of Newton's laws?
law of gravitation
2nd law
1st law - inertia
3rd law - action/reaction
5
To achieve the maximum torque in a situation, how should the force be applied?
at a 45 deg angle to the lever amr
perpendicular to the lever arm
parallel to the lever arm
6
In the Boom lab, how many down forces were there?
5
none of these is correct
2
4
7
What is the unit of angular frequency?
m/s
Hertz/s
none of these is correct
Hertz
8
Why is the unit of torque, the N*m, not a Joule?
Work is F at a distance, torque is F times distance
It is. They are the same thing.
Work is F times distance, torque is a F at a distance
9
What is the unit of torque?
N * m
Joule
Curie
Farad
10
What artist built this mobile?
Davinci
Picasso
Calder
Pollack
11
Where must the center of gravity of this system be?
directly over the stand
at the edge of the umbrella closest to the stant
at the edge of the umbrella furthest away from the stand
in the center of the umbrella
12
The longer the lever arm, the greater the applied torque.
True
False
13
On the bar with the green monkey, which mass must be larger?
they are equal
monkey
cat + dog + stick
14
In the Boom lab, how did you measure the angle of the string with respect to the meterstick?
measured it with a protractor
none of these is correct
used an app called Angle Meter
calculated it using trig
15
What type of physics thing is this umbrella?
force meter
cantilever
antilever
spring scale
16
What is the r in the τ=Fr formula?
value of the resistor
length of the lever arm
radius of the circular path
17
In the Boom lab, how many up forces were there?
5
2
none of these is correct
4
18
Which of the things in this device must be very very heavy?
umbrella
stand
19
Which of these tools are an application of torque?
pliers
crowbar
wrench
jack
20
What direction is the velocity vector for a car moving along a circular path?
along the circle
at a tangent to the circle
perpendicular to the circle
none of these is correct
21
Is this situation an application of torque?
yes
no
22
If the torque clockwise is 12.5 N*m and counterclockwise is 8.25 N*m, what direction is a wheel turning?
it is balanced and at rest
clockwise
counterclockwise
23
On the bar with the red cat and pink dog, which mass must be larger?
they are equal
cat
dog
24
Which of these is true for an object following a horizontal circular path?
the object is in equilibrium
the linear speed is constant
the velocity is constant
the object is accelerating
