6. Two disks are rotating about the same axis. Disk A has a moment of inertia of 4.00 kg.m² and an angular velocity of +6.80 rad/s. Disk B is rotating with an angular velocity of -11.8 rad/s. The two disks are then linked together without the aid of any external torques, so that they rotate as a single unit with an angular velocity of -2.50 rad/s. The axis of rotation for this unit is the same as that for the separate disks. What is the moment of inertia of disk B? kg.m2 36 skp

1. A carousel is initially at rest. At t = 0 it is given an angular acceleration of 0.088 rad/s^2, which increases its angular velocity for 15 secs. At t = 15, determine the linear velocity, in m/s, of a child riding the carousel located 1.37 m. from the center. Round off to two decimal places.

A uniform solid disk of radius 3 m and mass 2.0 kg rolls without slipping. to the bottom of an inclined plane. If the angular velocity of the disk is 8 rd/s at the bottom, what is the height of the inclined plane? 22m 19.71m None of the above 6.73m 44.1 m/s

A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.79 x 10^4 rad/s to an angular speed of 3.13 × 10^4 rad/s. In the process, the bit turns through 3.01 x 10^4 rad. Assuming a constant angular acceleration, how long would it take the bit to reach its maximum speed of 8.46 × 10^4 rad/s, starting from rest?

3. A wheel is rotating about an axis that is in the z-direction. The angular velocity is -6 rad/s at t=0, increases lin early with time, and is +8 rad/s at t=7.00s. We have taken counterclockwise rotation to be positive. (a) Is the angular acceleration during this time interval positive or negative? (b) During what time interval is the speed of the wheel increasing? Decreasing? (c) What is the angular displacement of the wheel at t=7.00s?

A uniform rod of length 32 m and mass 31.5 kg is free to rotate about a frictionless pivot at one end in a vertical plane, as in the figure. The rod is released from rest in the horizontal position. 31.5 kg 16 m 32 m What is the magnitude of the initial angular acceleration of the rod? The acceleration of gravity is 9.8 m/s² . Answer in units of rad/s?. 2

A figure skater rotating at 50.00 rad/s with arms extended has a moment of inertia of 4.5 kg. m^2. If the arms are pulled in so the moment of inertia decreases to 1.80 kg. m^2, what is the final angular speed? O 17.6 rad/s 12.25 rad/s 0.125 rad/ s 0.81 rad/s 125 rad /s

A dentist causes the bit of a high speed drill to accelerate from an angular speed of 1.76e4 rad/s to an angular speed of 3.71e4 rad/s. In the process, the bit turns through 1.62e4 rad.Assuming a constant angular acceleration, how long would it take the bit to reach its maximum speed of 8.42e4 rad/s starting from rest.

11.2

Assume a clock mounted on the wall, what is the value of angular acceleration of the second hand of the clock on the wall ? 11 12 10 3. 765 2nrad / sec? 60 rad / sec? O rad/sec2 n rad/ sec? 4.