Question

Asked Nov 17, 2019

6 views

Two disks are initially spinning, one above the other on a small axle that provides a small, but non-negligible torque from friction, as shown in the figure below. Both disks have the same radius, R=2.68 m. Disk 1 has a moment of inertia I_1=11.1 kg⋅m2. Disk 2 has a moment of inertia I_2=16.6 kg⋅m2. Let vertically up be the z direction, such that counterclockwise rotation as viewed from above corresponds to positive values of the z-component. Disk 1 is initially spinning with a z-component of angular velocity ω_1,z=10.3 rad/s, and disk 2 is initially spinning with a z-component of angular velocity ω_2,z=−15.5 rad/s.

*Common angular velocity: ω_common,z = ** -5.161 rad/s **

- How much thermal energy is created in the process of disk 1 falling on disk 2 such that they reach a common final angular velocity? You do not need to worry about the gravitational potential energy because the initial separation of the disks is small.

1 Rating

Step 1

Apply conservation of angular momentum for the discs, and solve for the common final angular ve...

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: An object with a 5.0 C charge is accelerating at 0.0050 m/s2 due to an electric field. If the object...

A: Given,

Q: A piece of lead has the shape of a hockey puck, with a diameter of 7.5 cm and a height of 2.3 cm . I...

A: Consider the mass of the brass cylinder be m, the weight of the mercury displaced be wm, the weight ...

Q: Use these relationships to determine the number of calories to change 1.2 kg of 100 degree Celsius b...

A: (a) Write the expression for heat required for changing 100˚C to steam at 100˚C.

Q: Chapter 6 Applications of Linear Second Order Equations 288 6.2 Exercises 4. A 96 lb weight stretche...

A: Equation of motion is,

Q: A person holds a 1.42 Newton baseball in his hand, a distance of 34 cm from the elbow joint, as show...

A: a)Net Torque is,

Q: A spring has a force constant of 12.9 N/m and a rest length of 0.25 m. Some amount of work is expend...

A: The work done expended to stretch the spring is

Q: A steel wire of diameter 1 mm can support a tension of 0.25 kN. Suppose you need a cable made of the...

A: According to the young’s modulus of the material.Rewrite the equation for area of the steel wire and...

Q: A wave of the form: y(x,t)= (0.035 m) cos[(160 s-1)t +(5 m-1) x] travels dowm a string with a densit...

A: The wave can be represented as

Q: if gas cloud in the image crosses in front of the star, and the gas cloud and star have different ra...

A: A gas cloud has a lot of hydrogen in it, which abosrbs the UV light emitted by a star. When UV light...