Posted by **applebottom** on Saturday, December 11, 2010 at 6:10pm.

A circular disk of mass 0.2 kg and radius 24 cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7 kg and the same radius, rotating freely at 3.4 rad/s.

a) Find the new angular velocity of the combination;

rad/s

b) The change in the kinetic energy?

c) If the motor is switched on after the disk has landed, what is the constant torque needed to regain the original speed in 2.6 s?

## Answer this Question

## Related Questions

Physics - A circular disk of mass 0.3 kg and radius 40 cm, initially not ...

physics - A circular disk of mass 0.2 kg and radius 24 cm, initially not ...

Physics - A turntable with a moment of inertia of 0.017 kg*m^2 rotates feely at...

physics - A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s ...

Physics - A turntable with a moment of inertia of 0.017 kg*m^2 rotates feely at ...

Physics - A turntable with a moment of inertia of 0.029 kg*m^2 rotates feely at ...

physics - A turntable with a moment of inertia of 0.014 kg*m2 rotates feely at ...

Physics - A large disk of mass M and radius R is spinning like a CD of merry-go-...

Physics 121 - The disk has mass 10kg and radius 0.25m. The rod has mass 5kg, ...

Physics 121 - The disk has mass 10kg and radius 0.25m. The rod has mass 5kg, ...