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Rotational motion with a constant nonzero acceleration is not uncommon in the world around us. For instance, many machines have spinning parts. When the machine is turned on or off, the spinning parts tend to change the rate of their rotation with virtually constant angular acceleration. Many introductory problems in rotational kinematics involve the motion of a particle with constant, nonzero angular acceleration. The kinematic equations for such motion can be written as
and
.
Here, the symbols are defined as follows:
-
is the angular position of the particle at time .
-
is the initial angular position of the particle.
-
is the angular velocity of the particle at time .
-
is the initial angular velocity of the particle.
-
is the angular acceleration of the particle.
-
is the time that has elapsed since the particle was located at its initial position.
In answering the following questions, assume that the angular acceleration is constant and nonzero: .
A)
True or false: The quantity represented by is a function of time (i.e., is not constant).
true
false
B)
True or false: The quantity represented by is a function of time (i.e., is not constant).
true
false
C)
True or false: The quantity represented by is a function of time (i.e., is not constant).
true
false
D)
True or false: The quantity represented by is a function of time (i.e., is not constant).
true
false
E)
Which of the following equations is not an explicit function of time ? Keep in mind that an equation that is an explicit function of time involves as a variable.
F)
In the equation , what does the time variable represent?
Choose the answer that is always true. Several of the statements may be true in a particular problem, but only one is always true.
the moment in time at which the angular velocity equals
the moment in time at which the angular velocity equals
the time elapsed from when the angular velocity equals until the angular velocity equals
Rotational motion with a constant nonzero acceleration is not uncommon in the world around us. For instance, many machines have spinning parts. When the machine is turned on or off, the spinning parts tend to change the rate of their rotation with virtually constant angular acceleration. Many introductory problems in rotational kinematics involve the motion of a particle with constant, nonzero angular acceleration. The kinematic equations for such motion can be written as
and
.
Here, the symbols are defined as follows:
- is the angular position of the particle at time .
- is the initial angular position of the particle.
- is the angular velocity of the particle at time .
- is the initial angular velocity of the particle.
- is the angular acceleration of the particle.
- is the time that has elapsed since the particle was located at its initial position.
In answering the following questions, assume that the angular acceleration is constant and nonzero: .
A)
True or false: The quantity represented by is a function of time (i.e., is not constant).
|
B)
True or false: The quantity represented by is a function of time (i.e., is not constant).
|
C)
True or false: The quantity represented by is a function of time (i.e., is not constant).
|
D)
True or false: The quantity represented by is a function of time (i.e., is not constant).
|
E)
Which of the following equations is not an explicit function of time ? Keep in mind that an equation that is an explicit function of time involves as a variable.
|
F)
In the equation , what does the time variable represent?
Choose the answer that is always true. Several of the statements may be true in a particular problem, but only one is always true.
|
Supratim PalLv10
24 Oct 2020