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WorksheetsPhysics Unit 5 (Rotational Motion) Test Review
Total questions: 20
Worksheet time: 1hrs 7mins
There are 400 ___________ in one revolution of a circle.
Gradiens
Radians
Degrees
None of the Above
There are 2π ___________ in one revolution of a circle.
Gradiens
Radians
Degrees
None of the Above
There are 360 ___________ in one revolution of a circle.
Gradiens
Radians
Degrees
None of the Above
As an object rotates, the change in the angle is called _______ ____ and represented by ________
angular displacement AND s
angular displacement AND θ
rotational displacement AND θ
rotational displacement AND s
The angular velocity is represented by the Greek letter ____.
ω
θ
α
σ
The angular acceleration is represented by the Greek letter ____.
ω
θ
α
σ
To convert between linear velocity and angular velocity you used ___________.
r =vω
ω = vr
ω=r/v
v =rω
The relationship between angular acceleration and linear acceleration is _________
α = a/r
a = α/r
α =ar
a = αr
To convert between revolutions and radians you must _________.
Multiple the number of revolutions by 2π
Divide the number of revolutions by 2π
Divide 2π by the number of revolutions
None of the above
The frequency of an object is ________.
the number of complete revolutions made by an object in 1 s.
the time it takes for one revolution of an object.
Neither of the other answers
Both of the other answers
To calculate the frequency you _______.
divide the number of revolutions by the angular velocity.
divide the number of radians by the angular velocity.
divide the angular velocity by the number of radians.
divide the angular velocity by the number of revolutions.
Torque causes angular acceleration.
True
False
The center of mass of an object is located by hanging the object and then drawing a horizontal line from the point of suspension, and then repeating the process a second time. The center of mass falls at the intersection of the two lines.
True
False
If the angular position is plotted as a function of time, the angular velocity would be ________.
an individual point on the graph.
equal to the angular acceleration.
the slope of the graph.
none of the other answers.
Which of the following is NOT a condition of static equilibrium?
The angular velocity of the object is constant.
The velocity of the object is changing.
The angular velocity of the object is zero.
The velocity of the object is zero.
When a fan performing 10 revolutions per second is switched off, it comes to rest after 10 seconds. Calculate the magnitude of the average angular acceleration of the fan after it was switched off.
1 rad/s2
2π rad/s2
π rad/s2
10 rad/s2
Torque can be described as
how effectively a force causes a rotation
the ratio of mass to angular acceleration
the ratio of moment of inertial to angular acceleration
None of the other answers
The resistance to rotation is __
angular inertia.
torque
the center of mass
the moment of inertia.
Which of the following is false?
An object is said to be in static equilibrium if both its velocity and angular velocity are zero or constant.
An object is said to be in translational equilibrium; that is, the net force exerted on the object must be zero.
An object is said to be in dynamic equilibrium when the net torque exerted on the object is zero.
An object is said to be in rotational equilibrium when the net torque exerted on the object is zero.
What is at work when the winds rotate in the counterclockwise direction in the northern hemisphere and clockwise in the southern hemisphere.
Centripetal force
Centrifugal force
Coriolis force
Central force
