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 /2MR2. There's no sliding. Strap's final speed = v = 1.06 m/s. The disc's radius is R = 0.9 m %3D The small disc's radius is 2 cm The disc's mass is M = 0.8 kg

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 /2MR2. There's no sliding. Strap's final speed = v = 1.06 m/s. The disc's radius is R = 0.9 m %3D The small disc's radius is 2 cm The disc's mass is M = 0.8 kg