A ventilation fan with a moment of inertia of 4.9 kg-m2 has a net torque of 4.1 N-m applied to it. If it starts from rest, what angular momentum will it have 9.8 s later?

An object's moment of inertia is 2.50 kgxm^2 . Its angular velocity is increasing at the rate of 3.30 rad/s^2 . What is the net torque on the object?

A student sits on a rotating stool holding two 4.0 kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation, and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg-m? and is assumed to be constant. The student then pulls the objects horizontally to 0.20 m from the rotation axis. (a) Find the new angular speed of the student. rad/s (b) Find the kinetic energy of the student system before and after the objects are pulled in. before after

Bubba Watson is driving a golf ball off the tee. His downswing takes 0.50 s from the topof the swing until ball impact. At the top of the swing, the club’s angular velocity is zero;at the instant of ball impact, the club’s angular velocity is 30 rad/s. The swing moment ofinertia of the club about the grip is 0.220 kg·m2. What average torque does Bubba exerton the golf club during the downswing? Maybe he will take all of Tiger’s money on theLIV tour....13.2 Nm

A sanding disk with rotational inertia 0.0012 kg-m2 is attached to an electric drill whose  motor delivers a torque of magnitude 15 N-m about the central axis of the disk.  About that axis and with a torque applied for 48 millisecond, what is the magnitude of the angular momentum?

A torque of magnitude 50N · m acts for 3 seconds to start a small airplane propeller (I = 12mr2) of length 1.2m and mass 10kg spinning. If treated as a rod rotated about its center, what is the final angularspeed of the propeller if we neglect the drag on it

Two disks are initially spinning, one above the other on a small axle that provides a small, but non-negligible torque from friction, as shown in the figure below. Both disks have the same radius, R = 2.58 m. Disk 1 has a moment of inertia I1 = 9.8 kg⋅m2. Disk 2 has a moment of inertia I2 = 5 kg⋅ m2. Let vertically up be the z direction, such that counterclockwise rotation as viewed from above corresponds to positive values of the z-component. Disk 1 is initially spinning with a z-component of angular velocity ω1,z = 21 rad/s, and disk 2 is initially spinning with a z-component of angular velocity ω2,z = -15 rad/s. The z component of their common angular velcoity is 8.837 rad/s How much thermal energy is created in the process of disk 1 falling on disk 2 such that they reach a common final angular velocity? You do not need to worry about the gravitational potential energy because the initial separation of the disks is small. I get I need to use kinetic energy equations of 1/2*I*w2 but…

a 20 Nm torque acts on a wheel that has 150kgm^2 moment of inertia  1.calculate the angular acceleration of the wheel.