A strap, rod, or something comparable is used to spin up the disc. I imagine someone hand- starting a lawnmower. If he pulls the strap with a final speed before pulling the strap away, what is the rotation rate of the disk, w in rev/s? The moment of inertia of a disc is 1/2MR2. There's no sliding. • Strap's final speed = v = 1.05 m/s. • The disc's radius is R = 0.6 m • The small disc's radius is 1 cm • The disc's mass is M = 0.7 kg %3D

A flywheel slows from 662 to 400 rev/min while rotating through 38 revolutions. a. What is the (constant) angular acceleration of the flywheel? rad/s2 b. How much time elapses during the 38 revolutions? t S a

A phonograph record accelerates from rest to 36.0 rpm in 4.53 s. (a) What is its angular acceleration in rad/s²? rad/s² (b) How many revolutions does it go through in the process? rev

A rotating wheel requires 6.00 s to rotate 28.0 revolutions. Its angular velocity at the end of the 6.00-s interval is 95.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel? rad/s2

4. A skater has a moment of inertia of 105.0 kg.m² when his arms are outstretched and a moment of inertia of 64.0 kg.m² when his arms are tucked in close to his chest. If he starts to spin at an angular speed of 80.0 rpm (revolutions per minute) with his arms outstretched, what will his angular speed be when they are tucked in? rpm

A strap, rod, or something comparable is used to spin up the disc. T imagine someone hand-starting a lawnmower. If he pulls the strap with a final speed before pulling the strap away, what is the rotation rate of the disk, w in rev/s? The moment of inertia of a disc is 1/2MR?. There's no sliding. • Strap's final speed = v = 0.74 m/s. • The disc's radius is R = 0.7 m • The small disc's radius is 1 cm • The disc's mass is M = 0.7 kg

A rotating wheel requires 7.00 s to rotate 30.0 revolutions. Its angular velocity at the end of the 7.00-s interval is 99.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel? rad/s²