# two disks are rotating about the same axis disk a

### physics Angular Momentum Flashcards | Quizlet

Using I times omega we can see that with twice the angular speed, but half the moment of inertia, the disk will have the same magnitude of angular momentum as the gear. In addition, they are rotating around the same axis, in the same direction, so their angular momenta are also in the same direction.

### Two disks are rotating about the same axis. Disk A has a ...

Nov 16, 2012· Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.8 kg · m2 and an angular velocity of +6.7 rad/s. Disk B is rotating with an angular velocity of -8.9 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 -2.3 rad/s. ...

### How can two disks of different radii rotate at the same ...

Mar 01, 2017· They will not, unless you allow for slippage. But I presume your problem assumes the no slip condition, so this situation is impossible. Look at the dynamics which drive the system: one of the shared quantities between the two disks is the speed o...

### Volume – Disk / Washer Method

the Y axis, and y = cosx 2 0 x about the X axis. 6) Use the Disk/Washer method to find the volume of the solid created by rotating the region bounded by the X axis, the Y axis, and y = cosx 2 0 x about the line y = 2. 7) Use the Disk/Washer method to find the volume of the solid created by rotating the region bounded by y = 2x2 - 3, y = -3,

### Two disks are rotating about the same axis. Disk A has a ...

Physics. 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 -10.2 rad/s.

### An Approximate Solution for Flow between Two Disks ...

ment consisting of two parallel disks rotating with the same angular velocity about two distinct axes normal to the disks is used. In this domain, Abbott and Walters [10]ob-tained an exact solution for the ﬂow of the Navier-Stokes ﬂuid. In the case of a viscoelas-

### Question 1: Two disks are rotating about the same axis ...

Question 1: Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.0 kg · m 2 and an angular velocity of +6.7 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.

### Angular velocity of two disks | Physics Forums

Jul 27, 2013· Two disks are rotating about an axis common to both. The first disk has moment of inertia I and angular velocity ω. The second disk has moment of inertia 2I and angular velocity $\frac{ω}{2}$ Both rotate in same direction If both disks are pushed into each other what is …

### Rotation: Moment of Inertia and Torque - Maplesoft

Example 2: Moment of Inertia of a disk about an axis passing through its circumference Problem Statement: Find the moment of inertia of a disk rotating about an axis passing through the disk's circumference and parallel to its central axis, as shown ... the same approach in …

### Define rotational inertia (moment of inertia) to be 2I = Σ ...

Define rotational inertia (moment of inertia) to be 2I = Σ m i r i or r i: the perpendicular distance between m i and the given rotation axis m 1 m 2 x 1 x 2 Moment of inertia . ... This figure shows a uniform disk, with mass M = 2.5 kg and radius R = 20 cm, mounted on a fixed horizontal axle.

### Physics 201 Examples - PCC

2. Two disks are rotating about the same axis. Disk A has a moment of inertia 4.4 kg-m2 of 3.4 kg-m2 and an angular velocity of +7.2 rad/s. Disk B is rotating with an angular velocity of -9.8 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 ...

### Conservation of angular momentum of a turntable | Physics ...

Apr 28, 2005· Consider a turntable to be a circular disk of moment of inertia I_t rotating at a constant angular velocity omega_i around an axis through the center and perpendicular to the plane of the disk (the disk's "primary axis of symmetry"). The axis of the disk is vertical and the disk is supported by ...

### Ladybugs on a Rotating Disk - Texas A&M University

Two ladybugs sit on a rotating disk, as shown in the figure (the ladybugs are at rest with respect to the surface of the disk and do not slip). Ladybug 1 is halfway between ladybug 2 and the axis of rotation. P a r t A What is the angular speed of ladybug 1? ANSWER: P a r t B

### physics, rotation question? | Yahoo Answers

Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.4 kg·m2 and an angular velocity of +7.2 rad/s. Disk B is rotating with an angular velocity of -9.8 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 -2.4 rad/s.

### Solved: Two Disks Are Rotating About The Same Axis. Disk A ...

Two disks are rotating about the same axis. Disk A has a moment of inertia of 5.28 kg·m2 and an angular velocity of +4.29 rad/s. Disk B is rotating with an angular velocity of -9.29 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 -3.01 rad/s.

### How can I find the Moment of Inertia? : explainlikeimfive

Apr 16, 2012· I'm trying to review for physics, and I'm completely lost on all things that deal with Angular Momentum. On my textbook, I stubmled upon this question: "Two Disks are rotating about the same axis. Disk A has a moment of inertia of 3.4 kg*m 2 and an angular velocite of 7.2 rad/s. Disk B is roating with an angular velocity of -9.8/s.

### Control the rotation of multiple discs along the same axis

Discs dddd dddd stay at same horizontal level. Disks are driven by shaft rotation when tttt is in line with disc. Assembly . xx dddd xx dddd A tttt tttt dddd xx dddd B xx tttt dddd xx dddd C xx xx dddd xx dddd D tttt xx xx As shown rotating the shaft drives no discs.

### physics angular momentum problem? | Yahoo Answers

Two disks are rotating about the same axis. Disk A has a moment of inertia of 7.20 kg·m2 and an angular velocity of +1.27 rad/s. Disk B is rotating with an angular velocity of -9.77 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 -3.04 rad/s.

### Puzzling : Relative motion of two points on a rotating disc

Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share …

### Spinning an Aluminium Disk with a magnet #3 rotation on ...

Mar 27, 2016· Spinning an Aluminium Disk with a magnet #3 rotation on same axis ... I cannot put them on the same axis as the steel needle and magnetic bearing get in the way. ... Strange rotation of a rotor ...

### Angular motion - multiple choice - SFU.ca

(b) his angular velocity remains the same. (c) his angular velocity increases. (d) he stops rotating. (e) his angular velocity changes direction. The moment of inertia of the man does not change when he drops the masses, so his angular velocity remains the same. Two points, A and B, are on a disk that rotates about an axis. Point A is three ...

### Spinning disk touches stationary disk - Stack Exchange

Spinning disk touches stationary disk [closed] ... Eventually there is no relative movement between the discs and the rotate at the same rate. ... write down the moment of inertia for the stationary disc to get the answer in the equation. since you have chosen your axis to be passing through the rotating disc, so in order to account for the ...

### Chapter 9 Rotation - North Hunterdon-Voorhees Regional ...

829 Chapter 9 Rotation Conceptual Problems 1 • Two points are on a disk that is turning about a fixed-axis through its center, perpendicular to the disk and through its center, at increasing angular velocity. One point on the rim and the other point is halfway between the rim and

### The moment of inertia of a uniform disc about an axis ...

This discussion on The moment of inertia of a uniform disc about an axis passing through its centre and perpendicular to its plane is 1kg - m2. It is rotating with an angular velocity 100 radians/second. Another identical disc is gently placed on it so that their centres coincide. Now these two discs together continue to rotate about the same axis.

### Two discs are rotating about their axes, normal to the ...

Dec 26, 2018· Two discs are rotating about their axes, normal to the discs and passing through the centres of the discs. Disc D 1 has 2 kg mass and 0.2 m radius and initial angular velocity of 50 rad s-1.Disc D 2 has 4 kg mass, 0.1 m radius and initial angular velocity of 200 rad s-1.The two discs are brought in contact face to face. with their axes of rotation coincident.

### Disc method around y-axis | Applications of definite ...

Jan 08, 2013· Finding the volume of a figure that is rotated around the y-axis using the disc method. Created by Sal Khan. Practice this lesson yourself on KhanAcademy.org...

### Two discs of same moment of inertia rotating about their ...

Apr 04, 2018· Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities ω 1 and ω 2 .They are brought into contact face to face coinciding the axis of rotation.

### Chap 6, 7, 8, 9: Quizzes Flashcards | Quizlet

A horizontal disk with moment of inertia I(1) rotates with angular speed W(1) about a vertical frictionless axle. A second horizontal disk having moment of inertia I(2) drops onto the first, initially not rotating but sharing the same axis as the first disk. Because their surfaces are rough, the two disks eventually reach the same angular speed W.

### Quiz Chaper 8-9.pdf - Two disks are rotating about the ...

Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.5 kg · m2 and an angular velocity of +7.1 rad/s. Disk B is rotating with an angular velocity of -9.7 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 -2.6 rad/s. The axis of rotation for this unit is the same as ...

### A horizontal disk is rotating counter-clockwise about its ...

A second disk, of moment of inertia equal to 2 kg.m^2 with respect to its axis of symmetry, rotating clockwise about the same axis at 7 rps, is dropped on top of the first disk. The two disks ...

### (Get Answer) - Two disks are rotating about the same axis ...

Jul 31, 2015· Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.6 kg A????1 m2 and an angular velocity of +7.6 rad/s. Disk B is rotating with an angular velocity of -10.8 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 -2.6 rad/s.

### (x - Welcome | Open Yale Courses

x y a b Since each \rod" has length a, it should be obvious that the sum of these contributions is simply 1 12 Ma 2, i.e., the same as if there was one rod of mass rotating around the axis, but let’s be more explicit. If we divide up the rectangle into n rods (where n is large so they really are rods, though in the end it doesn’t matter) so that each rod has mass M=n, then with each rod ...

### MasteringPhysics 2.0: Problem Print View

Consider a turntable to be a circular disk of moment of inertia rotating at a constant angular velocity around an axis through the center and perpendicular to the plane of the disk (the disk's "primary axis of symmetry"). The axis of the disk is vertical and the disk is supported by frictionless bearings.