Question

8) A disk is initially spinning about its center at 21 rad/s counter-clockwise and a constant...

8) A disk is initially spinning about its center at 21 rad/s counter-clockwise and a constant angular acceleration of 2.5 rad/s2 is applied to it clockwise. After 5.6 seconds how fast is a piece of dust moving, in m/s, which is 0.62 meters from the center of the disk?

Science   Advanced-Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Given the initial angular speed of disc is in the counterclockwise direction

However, the angular acceleration is in the clockwise direction

Since the angular acceleration of the disc is constant, the rotational motion of the disc is governed by the kinematics equation for uniformly accelerated motion. To find the angular velocity after 5.6 seconds we use

The speed of a point at a distance R away from the axis of rotation (which is the centre of the disc) is

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
7) A disk is initially spinning about its center at 18 rad/s counter-clockwise and a constant...
7) A disk is initially spinning about its center at 18 rad/s counter-clockwise and a constant angular acceleration of 2.9 rad/s2 is applied to it clockwise. How many revolutions does it make before it stops?
7) A disk is initially spinning about its center at 17 rad/s counter-clockwise and a constant...
7) A disk is initially spinning about its center at 17 rad/s counter-clockwise and a constant angular acceleration of 2.9 rad/s2 is applied to it clockwise. How many revolutions does it make before it stops?
A disk is initially spinning at 16 counter-clockwise. After 4 seconds, it is spinning clockwise and...
A disk is initially spinning at 16 counter-clockwise. After 4 seconds, it is spinning clockwise and a piece of dust located 1 meter from the center of disk is moving at 6 m/s. How many revolutions does the disk make before it stopped spinning?
Q1) Mass 1 is moving at 2 m/s in the +x direction and it collides inelastically...
Q1) Mass 1 is moving at 2 m/s in the +x direction and it collides inelastically with mass 2 of 17 kg moving at 11 m/s in the + x direction. 122 Joules of KE is lost in this collision. What is the average force on mass 1 if the collision takes place in 0.1 seconds? Answer in Newtons. Q2) A disk is initially spinning at 18 counter-clockwise. After 5 seconds, it is spinning clockwise and a piece of dust...
A disk of mass M is spinning freely at 4.67 rad/s when a second identical disk,...
A disk of mass M is spinning freely at 4.67 rad/s when a second identical disk, initially not spinning, is dropped onto it so that their axes coincide. In a short time the two disks are corotating. (a) What is the angular speed of the new system (in rad/s)? rad/s (b) If a third such disk is dropped on the first two, find the final angular speed of the system (in rad/s). rad/s
A disk of mass M is spinning freely at 5.45 rad/s when a second identical disk,...
A disk of mass M is spinning freely at 5.45 rad/s when a second identical disk, initially not spinning, is dropped onto it so that their axes coincide. In a short time the two disks are corotating. HINT (a) What is the angular speed of the new system (in rad/s)? rad/s (b) If a third such disk is dropped on the first two, find the final angular speed of the system (in rad/s). rad/s
Point Pis on the rim of a large Spinning Disk of mass 10.0 kg and radius...
Point Pis on the rim of a large Spinning Disk of mass 10.0 kg and radius 2.58 m. At time t=0.00 s the disk has an angular velocity of 4.00 rad/s and rotates counterclockwise about its center O, and Pis on the x-axis. A net applied CW torque of 20.0 m-N causes the wheel to undergo a uniform angular acceleration. The magnitude of the total acceleration (m/s2) at point Pwhen t = 15.0 s is? The angular velocity of the...
A wheel is spinning about a horizontal axis, with angular speed 140 rad/s and with its...
A wheel is spinning about a horizontal axis, with angular speed 140 rad/s and with its angular velocity pointing east. a.) Find the magnitude of its angular velocity after an angular acceleration of 34 rad/s2 , pointing 68 ∘ west of north, is applied for 5.5 s . Express your answer using two significant figures. b.) Find the direction of its angular velocity. Express your answer using two significant figures.
A person with mass mp = 77 kg stands on a spinning platform disk with a...
A person with mass mp = 77 kg stands on a spinning platform disk with a radius of R = 2.22 m and mass md = 195 kg. The disk is initially spinning at ω = 1.9 rad/s. The person then walks 2/3 of the way toward the center of the disk (ending 0.74 m from the center). 1) What is the total moment of inertia of the system about the center of the disk when the person stands on...
A 44.0-cm diameter disk rotates with a constant angular acceleration of 3.00 rad/s2. It starts from...
A 44.0-cm diameter disk rotates with a constant angular acceleration of 3.00 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (a) At t = 2.48 s, find the angular speed of the wheel. rad/s (b) At t = 2.48 s, find the magnitude of the linear velocity...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT