Question

Two disks are rotating about the same axis. Disk A has a moment of inertia of...

Two disks are rotating about the same axis. Disk A has a moment of inertia of 6 kg · m2 and an angular velocity of +10 rad/s. Disk B is rotating with an angular velocity of –4 rad/s and has a moment of inertia of 4kgm2. The two disks are then linked together without the aid of any external torques, so that they rotate as a single unit. The axis of rotation for this unit is the same as that for the separate disks.

A. The angular velocity of the system when linked together is:

B.How much rotational kinetic energy is lost in this situation?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Two disks are rotating about the same axis. Disk A has a moment of inertia of...
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.1 kg · m2 and an angular velocity of +8.0 rad/s. Disk B is rotating with an angular velocity of -9.3 rad/s. The two disks are then linked together without the aid of any external torques, so that they rotate as a single unit with an angular velocity of -2.2 rad/s. The axis of rotation for this unit is the same as that for...
Two disks are rotating about the same axis. Disk A has a moment of inertia of...
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.7 kg · m2 and an angular velocity of +7.7 rad/s. Disk B is rotating with an angular velocity of -10.4 rad/s. The two disks are then linked together without the aid of any external torques, so that they rotate as a single unit with an angular velocity of -2.5 rad/s. The axis of rotation for this unit is the same as that for...
A disk (mass of 3 kg, radius 30 cm) is rotating with an angular velocity w1=...
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?
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can...
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 3.88 kg·m2 about its central axis, is set spinning counterclockwise (which may be taken as the positive direction) at 176 rev/min. The second disk, with rotational inertia 7.15 kg·m2 about its central axis, is set spinning counterclockwise at 823 rev/min. They then couple together. (a) What...
A disk with moment of inertia I 1 rotates about a frictionless , vertical axle with...
A disk with moment of inertia I 1 rotates about a frictionless , vertical axle with angular speed W 1 =12 rad/s . A second disk, this one having moment of inertia l 2 =2l 1 and initially not rotating , drops onto the first disk. Because of friction between the surfaces , the two eventually reach the same angular speed w 2 . What is the final angular velocity of the combined system (in kg m/s^ 2 )
A horizontal turntable is made from a uniform solid disk and is initially rotating with angular...
A horizontal turntable is made from a uniform solid disk and is initially rotating with angular velocity of 7.1 rad/s about a fixed vertical axis through its center. The turntable has a radius of 0.23 m and a moment of inertia of 0.04761 kg m2 about the rotation axis. A piece of clay, initially at rest, is dropped onto the turntable and sticks to it at a distance d= 0.16 m from its center as shown in the figure. The...
If a disk is rotating from rest with an angular acceleration of 1.72 rad/s^2 for 5.67...
If a disk is rotating from rest with an angular acceleration of 1.72 rad/s^2 for 5.67 seconds, what is its final rotational kinetic energy? Take the moment of inertia of the disk to be 0.692 kg*m^2.
A uniform disk of mass Mdisk = 4 kg and radius R = 0.24 mhas a...
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...
A turntable has moment of inertia 1 kg m2 and rotates with angular speed of 3...
A turntable has moment of inertia 1 kg m2 and rotates with angular speed of 3 rad/s. A small heavy mass (point particle) of mass 5 kg is placed on the turn table at 2 m from the axis of rotation of the turn table. What is the final rotational velocity of the system? Give your result in rad/s to three significant figures.
A uniform disk A of mass mA= 8.2 kg turns at ωA=+50 rad/s about a fixed...
A uniform disk A of mass mA= 8.2 kg turns at ωA=+50 rad/s about a fixed central axis. Another rotating disk B of mass mB= 10.5 kg, with the same radius R of disk A, is dropped onto the freely spinning disk A (see figure). They become coupled and turn together with their centers superposed, as shown in the figure, with an angular velocity ω'=+33 rad/s. (The moment of inertia of the disk is  Id = [ 1/2]mR2, where m is...