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 shows five torques applied to a stick. Each stick shown has the same length and is pivoted around the dot. Rank, from least to greatest, the magnitude of torque applied to the stick in each case. If any torques are equal in magnitude, note this in your ranking.

A torque of 35.6 N · m is applied to an initially motionless wheel which rotates around a fixed axis. This torque is the result of a directed force combined with a friction force. As a result of the applied torque the angular speed of the wheel increases from 0 to 9.9 rad/s. After 5.80 s the directed force is removed, and the wheel comes to rest 59.8 s later.

If you hold your arm outstretched with your palm upward, the force to keep your arm from falling comes from your deltoid muscle. Assume that the arm with hand has mass 4.25 kg and the distances and angles shown. What is the magnitude of the torque must the deltoid muscle provide to keep the arm in this position, in N·m? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

The wheel and axle have forces applies tangentially as shown in the figure. There is also a frictional torque of 0.02 Nxm on the wheel, once the wheel starts moving. The radius of the axel is 20 cm and the radius of the wheelis 60 cm and F1 = 2.4 N, F2 = 3.0 N and F3 = 1.2 N. a. Calculate the net torque on the moving wheel due to the applied forces F1 F2 and F3. b. What direction of rotation would the applied forces cause? Explain. c. What is the direction of frictional torque? Explain. d. Calculate the net torque on the wheel and axle.

A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotating beam sweeps across the earth, and the earth receives a pulse of radio waves. For one particular pulsar, the time between two successive pulses is 0.027 s. Determine the average angular speed (in rad/s) of this pulsar. rad/s

A bicycle wheel initially is spinning with a tangential speed of 9 m/s. The radius of this wheel is 0.737 m, and its mass is 1 kg. The wheel takes 200 s to gradually stop spinning. Assuming the acceleration remains constant as the wheel slows down, through what total angle does it spin? 1175 rad 974 rad 1452 rad 1222 rad 1580 rad

The meter stick shown below rotates about an axis through the point marked - 20 cm from one end. Five forces act on the stick: one at each end, one at the pivot point, and two 40 cm from one end, as shown. The magnitudes of the forces are all the same. Rank the forces according to the magnitudes of the torques they produce about the pivot point, least to greatest. 0 cm 20 cm 40 cm 60 cm 80 cm 100 cm OF2and Fs tie, then F4, F.F F2and Fs tie, then F₁, then F₁ and F3 tie F₂. FS.F₁. and F, tie, then F ⒸF₁.F2. Fs. F4. Fs OFjand F₂ tie, then F3, F4. Fs

A wheel rotates clockwise about its central axis with an angular momentum of 600Kg.m 2 /s.At time t= 0, a torque of magnitude 50N.m is applied to the wheel to reverse the rotation. If the same torque is maintained, at what time will the angular momentum be counter-clockwise of 600Kg.m 2 /s?

A hollow disk with a moment of inertia of 0.5 kg-m2 experiences a net torque of 30 m-N. What is the disk's angular acceleration?   60 rad/s/s   0.02 rad/s/s   30 rad/s/s   15 rad/s/s