The figure below shows, at left, a solid disk of radius R = 0.700 m and mass 75.0 kg. Tu Mounted directly to it and coaxial with it is a pulley with a much smaller mass and a radius of r = 0.230 m. The disk and pulley assembly are on a frictionless axle. A belt is wrapped around the pulley and connected to an electric motor as shown on the right. The turning motor gives the disk and pulley a clockwise angular acceleration of 1.67 rad/s?. The tension T, in the upper (taut) segment of the belt is 145 N. (a) What is the tension (in N) in the lower (slack) segment of the belt? (b) What If? You replace the belt with a different one (one slightly longer and looser, but still tight enough that it does not sag). You again turn on the motor so that the disk accelerates clockwise. The upper segment of the belt once again has a tension of 145 N, but now the tension in the lower belt is exactly zero. What is the magnitude of the angular acceleration (in rad/s2)? rad/s2

The figure below shows, at left, a solid disk of radius R = 0.700 m and mass 75.0 kg. Tu Mounted directly to it and coaxial with it is a pulley with a much smaller mass and a radius of r = 0.230 m. The disk and pulley assembly are on a frictionless axle. A belt is wrapped around the pulley and connected to an electric motor as shown on the right. The turning motor gives the disk and pulley a clockwise angular acceleration of 1.67 rad/s?. The tension T, in the upper (taut) segment of the belt is 145 N. (a) What is the tension (in N) in the lower (slack) segment of the belt? (b) What If? You replace the belt with a different one (one slightly longer and looser, but still tight enough that it does not sag). You again turn on the motor so that the disk accelerates clockwise. The upper segment of the belt once again has a tension of 145 N, but now the tension in the lower belt is exactly zero. What is the magnitude of the angular acceleration (in rad/s2)? rad/s2

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

I am unsure how to appraoch this problem. how do I do it?
A 20-lb force is applied to the control rod AB as shown. Knowing that the length of the rod is 9 in. and that a = 25 degrees, (a) determine the moment of the force about point B by resolving the force into horizontal and vertical components. (b) Determine also the moment arm Choices are: M = 32 in-lbM = 148 in-lbM = 116 in-lbd = 1.60 ind = 7.40 ind = 6 in
Refer to the question below.
An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel as shown in figure. The flywheel is a solid disk with a mass of 80.0 kg and a radius R=0.625 m. It turns on a frictionless axle. Its pulley has much smaller mass and a radius of r=0.230 m. The tension T u in the upper ( taut ) segment of the belt is 135 N, and the flywheel has a clockwise angular acceleration of 1.67 rad/s 2 . Find the tension in the lower (slack ) segment of the belt.
A uniform disk of mass 401 kg and radius 0.24 m is mounted on frictionless bearings so it can rotate freely around a vertical axis through its center (see the following figure). A cord is wrapped around the rim of the disk and pulled with a force of 10 N. 10 N (a) How much work (in 3) has the force done at the instant the disk has completed four revolutions, starting from rest? (b) Determine the torque due to the force. (Enter the magnitude in N-m) N m Calculate the work (in 3) done by this torque at the instant the disk has completed rour violations (c) What is the angular velocity (in rad/s) at that instant? (Enter the magnitude.)
A bar 1m in length has a negligible mass and it is placed on a pivot point at the 0.55 m mark. A 2.3 kg mass hung at the 0 m mark and a 1.5 kg mass hung at the 1.0 m mark. The meterstick is released from rest in a horizontal position. Immediately after release, the magnitude of the SUMMATION OF TORQUE on the bar about the pivot point is most nearly A) 8.0 N•m B 2.0 N-m c) 6 N•m D 16 N•m E) 19 N•m
In the figure below, mass m is rotating about point A on a frictionless surface with a constant velocity vo and a constant radius ro. The other mass m was hinged by the cable and it stays in equilibrium thanks to the rotation of the first mass. fo oA Va m The test is repeated by changing the hinged mass to 2m. In this case, find the new constant radius ri, in terms of ro and the new constant velocity VI, in terms of va m roA VI 2m
A uniform disk of mass 500 kg and radius 0.25 m is mounted on frictionless bearings so it can rotate freely around a vertical axis through its center (see the following figure). A cord is wrapped around the rim of the disk and pulled with a force of 10 N. (a) How much work has the force done at the instant the disk has completed three revolutions, starting from rest? (b) Determine the torque due to the force, then calculate the work done by this torque at the instant the disk has completed three revolutions? (c) What is the angular velocity at that instant? (d) What is the power output of the force at that instant?
A 250-g mass hangs from a string that is wrapped around a pulley, as shown in the figure. The pulley is suspended in such a way that it can rotate freely. When the mass is released, it accelerates toward the floor as the string unwinds. Model the pulley as a uniform solid cylinder of mass 1.00 kg and radius 9.00 cm. Assume that the thread has negligible mass and does not slip or stretch as it unwinds. Determine the magnitude a of the pulley's angular acceleration. rad/s? a = Determine the magnitude of the acceleration a of the descending weight. a = m/s? Calculate the magnitude of the tension T' in the string. T =
A pulley on a frictionless axle has the shape of a uniform solid disk of mass 2.50 kg and radius 0.150m. A 1.50 kg stone is attached to a very light wire that is wrapped around the rim of the pulley (Fig), and the system isreleased from rest. (a) How far must the stone fall so that the stone has 1.20 m/s speed? (b) What percentage of the total kinetic energy does the pulley have?
In the higure, two 8.50 kg blocks are connected by a massiless string over a pulley of radius 250 cm and rotational inertia 740- 10 kgm. The string does not slip on the pulleyit is not known whether there is friction between the table and the sliding block the pulley's axis is frictionless. When this system is released from rest, the pulley burns through 0.600 rad in 183 ms and the acceleration of the blocks is constant. What are (a) the magnitude of the pulley's angular acceleration, b) the magnitude of either block's acceleration (e) string tension Ts, and (d) string tension TatAssume free-fal acceleration to be equal to 981 ms (a) Number Units Units (b) Number Units d Number Units 4) Number