Question

a. Through how many revolutions does a frisbee have to rotate to reach an angular speed...

a. Through how many revolutions does a frisbee have to rotate to reach an angular speed of 570 rad/s if it starts from rest and experiences a constant angular acceleration of 160 rad/s2?

b. How long does it take the frisbee to reach the angular speed of 570 rad/s?

c. A cord is wrapped around a pulley of radius 33.0 cm and mass 4.00 kg. A tension of 15.0 N is applied to end of the cord. A friction torque of 1.5 N m opposes the motion. Find the net torque.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

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
A rotating wheel requires 2.96-s to rotate through 37.0 revolutions. Its angular speed at the end...
A rotating wheel requires 2.96-s to rotate through 37.0 revolutions. Its angular speed at the end of the 2.96-s interval is 98.2 rad/s. What is the constant angular acceleration of the wheel? rad/s2
To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley....
To start her lawn mower, Julie pulls on a cord that is wrapped around a pulley. The pulley has a moment of inertia about its central axis of III = 0.590 kg⋅m2kg⋅m2 and a radius of 4.00 cmcm . There is an equivalent frictional torque impeding her pull of τfτftau_f = 0.260 m⋅Nm⋅N . To accelerate the pulley at ααalpha = 4.35 rad/s2rad/s2 , how much torque does Julie need to apply to the pulley? How much tension must the...
A wheel rotates with a constant angular acceleration of 3.90 rad/s2. Assume the angular speed of...
A wheel rotates with a constant angular acceleration of 3.90 rad/s2. Assume the angular speed of the wheel is 2.05 rad/s at ti = 0. (a) Through what angle does the wheel rotate between t = 0 and t = 2.00 s? Give your answer in radians and revolutions. rad? rev? (b) What is the angular speed of the wheel at t = 2.00 s? rad/s? (c) What angular displacement (in revolutions) results while the angular speed found in part...
A wheel rotates with a constant angular acceleration of 3.90 rad/s2. Assume the angular speed of...
A wheel rotates with a constant angular acceleration of 3.90 rad/s2. Assume the angular speed of the wheel is 1.55 rad/s at ti = 0. (a) Through what angle does the wheel rotate between t = 0 and t = 2.00 s? Give your answer in radians and revolutions. ___________rad ___________ rev (b) What is the angular speed of the wheel at t = 2.00 s? __________rad/s (c) What angular displacement (in revolutions) results while the angular speed found in...
A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually...
A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.159 rad/s2. After making 2870 revolutions, its angular speed is 132 rad/s. (a) What is the initial angular velocity of the turbine? (b) How much time elapses while the turbine is speeding up? 2. A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.11 x 104 rad/s to an...
A discus thrower (arm length 0.9 m) starts from rest and begins to rotate counterclockwise with...
A discus thrower (arm length 0.9 m) starts from rest and begins to rotate counterclockwise with a constant angular acceleration of +2.7 rad/s2. (a) How many radians of angle does it take for the discus thrower's angular velocity to reach +7.0 rad/s? rads (b) How long does this take? seconds At this time (from part b), please find the following quantities: (c) the linear speed of the discus: m/s (d) the size of the discus's tangential acceleration: m/s2 the size...
Frictional torque causes a disk to decelerate from an angular speed of 4.30 rad/s at t...
Frictional torque causes a disk to decelerate from an angular speed of 4.30 rad/s at t = 0 to 2.00 rad/s at t = 4.80 s. The equation describing the angular speed of the wheel during this time interval is given by dθ dt = ω0e−bt, where b and ω0 are constants. (a) What are the values of b and ω0 during this time interval? b = _______s−1 ω0 = _______rad/s (b) What is the magnitude of the angular acceleration...
A wheel at rest is accelerated with uniform angular acceleration 4.6 rad/s2. How many revolutions does...
A wheel at rest is accelerated with uniform angular acceleration 4.6 rad/s2. How many revolutions does it take for the wheel to achieve 857 rev/min? A child is sitting a distance 8 m from the center of a merry-go-round that is 18.6 m in diameter. If the merry-go-round makes 8.8 rev/min, what is the velocity of the child in m/s? An object is in circulation motion at a speed of 499 rad/sec when it begins to slow down at a...
Two spheres are each rotating at an angular speed of 23.7 rad/s about axes that pass...
Two spheres are each rotating at an angular speed of 23.7 rad/s about axes that pass through their centers. Each has a radius of 0.360 m and a mass of 1.68 kg. However, as the figure shows, one is solid and the other is a thin-walled spherical shell. Suddenly, a net external torque due to friction (magnitude = 0.400 N · m) begins to act on each sphere and slows the motion down. How long does it take (a) the...
We have learned that Torque is equal to a force that is perpendicular to a radius...
We have learned that Torque is equal to a force that is perpendicular to a radius (displacement); however, I just cannot grasp one of the study questions we received: A hammer thrower accelerates the hammer (mass = 7.30 kg) from rest within four full turns (revolutions) and releases it at a speed of 30.0 m/s. Assuming a uniform rate of increase in angular velocity and a radius of 1.50 m, calculate the following answers. (a)the angular acceleration: 7.96 rad/s2 (b)...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT