Question

A) Rotational kinetic energy involves:

- Velocity, mass, acceleration;
- Velocity and mass only;
- Angular velocity, moment of inertia, angular acceleration;
- Angular velocity and moment of inertia only.

B) Any object’s moment of inertia depends on its:

- Size only;
- Size and shape only;
- Mass only;
- Size, shape and mass.

C) For a given mass, the *largest* moment of inertia will
be when it is shaped into a:

- Ring;
- Sphere;
- Disk.

D) For a given mass, the *largest* moment of inertia will
be when it is shaped into a:

- Ring;
- Sphere;
- Disk.

E) The *work-energy theorem* applies to:

- Isolated systems only;
- Non-isolated systems only;
- Both isolated and non-isolated systems.

Answer #1

1. Assuming that the acceleration of the driving mass
was constant, calculate the speed and the translational kinetic
energy of the driving mass just as it strikes the ground. Use the
average of the three measured times.
2. Using conservation of energy, calculate the
rotational kinetic energy of the system just as the driving mass
strikes the ground.
3. Calculate the angular velocity of the system just as
the driving mass strikes the ground.
4. Using the rotational kinetic energy...

A disk (mass of 3 kg, radius 30 cm) is rotating with an angular
velocity w1= 5 rad/s. A second disk (mass 2kg, radius 15cm), which
is rotating at w= -7 rad/s is dropped on top of the first disk. The
disks are dropped so that they share a rotational axis, and they
stick together. The moment of inertia of a disk is 1/2mr^2. What is
the final angular speed of the two disks?

1. When you drop the mass holder, the system rotates at angular
acceleration a. Suppose you wrapped the string around a larger
diameter pulley and dropped the mass holder. What would happen to
a, the angular acceleration of the system, and I, the measured
moment of inertia of the system?
Does it increase, decrease, or stay the same?
2. Calculate the moment of Inertia for a metal ring with a mass
4.54 kg and an innter radius of 4.86 cm...

A uniform disk of mass Mdisk = 4 kg and radius R =
0.24 mhas a small block of mass mblock = 2.2 kg on its
rim. It rotates about an axis a distance d = 0.16 m from its center
intersecting the disk along the radius on which the block is
situated.
What is the moment of inertia of the block about the rotation
axis?
What is the moment of inertia of the disk about the rotation
axis?
When...

Question 2
part 1
-Time rate of change in an angular displacement is called?
Hint:
part 2
-What are the two types of acceleration in a Rigid-Body
Rotation?
part 3
-What depends on a body’s mass and how the mass is
distributed?
part 4
-When the moment of inertia is very large, what
does this mean about the rotational kinetic energy
of a rigid body?
part 5
-Lever Arm or moment arm, Line of
Action are taken into consideration when...

A stick of mass M and length L is pivoted at one end. A
small mass m<M is attached to the right-hand end of the stick.
The stick is held horizontally and released from rest.
Given that the rotational inertia of a uniform rod
pivoted around one end is 1/3ML^2, determine the rotational inertia
of the described system.
Calculate the angular velocity of the system when it
reaches a vertical position. You cannot use rotational kinematics
here because angular acceleration...

An object is rotating about its center of mass. In
space. The Boötes Void, to be less vague. Point A is on the surface
of the object in the plane perpendicular to the axis of
rotation.
Select all of the following properties that depend on the size
and/or shape of the object.
a. Angular velocity of point A
b. Tangential acceleration of point A.
c.Tangential velocity of point A
d. Moment of inertia
e. Angular acceleration of point A
Can...

A disk with mass m = 8.5 kg and radius R = 0.35 m begins at rest
and accelerates uniformly for t = 18.9 s, to a final angular speed
of ? = 29 rad/s.
a) What is the angular acceleration of the disk?
b) What is the angular displacement over the 18.9 s?
c) What is the moment of inertia of the disk?
d) What is the change in rotational energy of the disk?
e) What is the tangential...

A disk with mass m = 9.5 kg and radius R = 0.3 m begins at rest
and accelerates uniformly for t = 18 s, to a final angular speed of
ω = 28 rad/s.
A)What is the angular acceleration of the disk?
B)What is the angular displacement over the 18 s?
C)What is the moment of inertia of the disk?
D)What is the change in rotational energy of the disk?
E)What is the tangential component of the acceleration of...

A person with mass mp = 70 kg stands on a spinning
platform disk with a radius of R = 2.04 m and mass md =
186 kg. The disk is initially spinning at ω = 2 rad/s. The person
then walks 2/3 of the way toward the center of the disk (ending
0.68 m from the center).
What is the total moment of inertia of the system about the
center of the disk when the person stands on the...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 13 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago