physics

A disk of mass m is spinning freely at 6.22 rad/s when a second disk of identical mass, initially not spinning, is dropped on it so that their axes coincide. In a short time the two disks are corotating. (The two disks have the same radius.)
(a) What is the angular speed of the new system?
rad/s

(b) If a third such disk is dropped on the first two, find the final angular speed of the system.
rad/s

  1. 👍 0
  2. 👎 0
  3. 👁 343
  1. a) 2.34 rad/s
    b) .94 rad/s

    1. 👍 0
    2. 👎 0
  2. Note: I might not be correct, but I did put more work into this answer by just making up answers than you did in the post.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics (help)

    A solid disk 1 with radius R1 is spinning freely about a frictionless horizontal axle l at an angular speed ω initially. The axle l is perpendicular to disk 1, and goes through the center S of disk 1. The circumference of disk 1

    asked by Anonymous on November 6, 2013
  2. Physics Classical Mechanics

    A solid disk 1 with radius R1 is spinning freely about a frictionless horizontal axle l at an angular speed ω initially. The axle l is perpendicular to disk 1, and goes through the center S of disk 1. The circumference of disk 1

    asked by A on November 7, 2013
  3. physics

    A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s around an axis perpendicular to its center. A second disk that is not rotating is dropped onto the first disk so that their centers align, and they stick together.

    asked by MD on June 9, 2010
  4. physics

    A bug that has a mass mb = 1 g walks from the center to the edge of a disk that is freely turning at 38 rpm. The disk has a mass of md = 11 g. If the radius of the disk is R = 30 cm, what is the new rate of spinning in rpm?

    asked by katie on March 25, 2012
  5. Physics

    A person with mass mp = 74 kg stands on a spinning platform disk with a radius of R = 2.31 m and mass md = 183 kg. The disk is initially spinning at ω = 1.8 rad/s. The person then walks 2/3 of the way toward the center of the

    asked by MUHAMMAD JUNAID on April 21, 2019
  1. physics

    A circular disk of mass 0.2 kg and radius 24 cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7 kg and the same radius, rotating freely at 3.4 rad/s. a) Find the new angular velocity of the

    asked by applebottom on December 11, 2010
  2. Physics

    A circular disk of mass 0.3 kg and radius 40 cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7 kg and the same radius, rotating freely at 3.1 rad/s. a) Find the new angular velocity of the

    asked by John on December 4, 2011
  3. Physics

    The moment of inertia of an object depends on the shape of the object, location and orientation of the axis of rotation. For a solid disk, when the disk is rotating about an axis that is perpendicular to the disk and passing

    asked by Ellie on October 29, 2009
  4. physics help 4 please!

    A solid disk (mass = 1 kg, R=0.5 m) is rolling across a table with a translational speed of 9 m/s. a.) What must the angular speed of the disk be? ? rad/s b.) What is the rotational KE of the disk? ? J c.) What is the total KE of

    asked by kelsey on October 18, 2008
  5. Physics

    A solid cylindrical disk has a radius of 0.18 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 40-N force is applied tangentially to the disk, perpendicular to the radius, the

    asked by Kelsey on November 22, 2011

More Similar Questions