Two forces act on a uniform disk with a radius of 2.0 cm and a mass of 20.0 g which is initially at rest. After 1.25 s the disk has an angular velocity of 250 rad/s counterclockwise. Determine the force F2 if F1 has a magnitude of 0.1 N. Write your answer to the hundredth newton.
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Two forces act on a uniform disk with a radius of 2.0 cm and a mass of 20.0 g which is initially at rest. After 1.25 s the disk has an
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- Please asapAn old millstone, used for grinding grain in a gristmill, is a solid cylindrical wheel that can rotate about its central axle with negligible friction. The radius of the wheel is 0.330 m. A constant tangential force of 300 N applied to its edge causes the wheel to have an angular acceleration of 0.824 rad/s2. A. What is the moment of inertia of the wheel (in kg · m2)? B. What is the mass (in kg) of the wheel? C. The wheel starts from rest and the tangential force remains constant over a time period of 4.50 s. What is the angular speed (in rad/s) of the wheel at the end of this time period?Hint Three children are riding on the edge of a merry-go-round that has a mass of 105 kg and a radius of 1.60 m. The merry-go-round is spinning at 16.0 rpm. The children have masses of 22.0, 28.0, and 33.0 kg. If the 28.0 kg child moves to the center of the merry-go-round, what is the new angular velocity in revolutions per minute? Ignore friction, and assume that the merry-go-round can be treated as a solid disk and the children as point masses. Question Credit: OpenStax College Physics final angular velocity: rpm privacy policy terms of use contact us help about us careers
- A 4.00 kg mass is moving in a circular path with a constant angular speed of 5.00 rad/sec and with a linear speed of 5.00 m/sec. The magnitude of the radial force on the mass is Multiple Choice 90.0 N. 100 N. 125 N. 169 N. 200 N.A solid disk with a mass of 1.0 kg and a radius of 0.25 spins at an angular velocity of 10 rad/s. A string that wraps around the edge of the disk applies a 2.0 N force tangent to the disk, for 0.5 seconds. What is the new angular velocity?A solid cylindrical disk has a radius of 0.12 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 disk acquires an angular acceleration of 100 rad/s2. What is the mass of the disk? kg
- The angular momentum of a spinning wheel is 218 kg·m2/s. After application of a constant braking torque for 2.30 s, it slows and has a new angular momentum of 115 kg·m2/s. What is the torque applied? If the applied torque is in the direction of the rotation of the wheel, enter a positive value and if the applied torque is opposite to the rotation of the wheel, enter a negative value.The figure below is for a 50 kg-m2 object. o(radis) 60.0 40.0 20.0 -20.0 2.0 4.0 t(s) Find the net torque. Find the angular displacement at t = 2.25 s.e When astronauts returnfrom prolonged space flights, they often suffer from bone loss,resulting in brittle bones that may take weeks for their bodies torebuild. One solution may be to expose astronauts to periods ofsubstantial “g forces” in a centrifuge carried aboard their spaceship. To test this approach, NASA conducted a study in which fourpeople spent 22 hours each in a compartment attached to the endof a 28-foot arm that rotated with an angular speed of 10.0 rpm.(a) What centripetal acceleration, in terms of g, did these volunteers experience? (b) What was their linear speed?
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