Frictionless, horizontal table radius and speed ?

[Ynsgfnsv]

Frictionless, horizontal table...radius and speed...?

The 0.20 kg puck on a frictionless, horizontal table is connected by a string through a hole in the table to a hanging 1.20 kg block. With what speed must the puck rotate in a cicle of radius 0.50 m if the block is to remain hanging at rest?

 

[arildno]

Remember that it is the rope tension that:

1. May hold the block hanging (what must therefore the tension be equal to?)

2. Provides the centripetal acceleration of the puck.

The tension of the rope is equal in magnitude in whatever segment of the rope..