Question

A 1.1 kg block sits on a frictionless table that has a hole cut in the middle of it. The 1.1 kg mass is connected to a string that goes through the hole in the table and attaches to a 3.2 kg mass. The 1.1 kg mass moves is a circle of radius 0.4 meters. How fast does it have to be moving so that the 3.2 kg mass does not fall? What is the tension in the string?

Answer 1

The tension in the string must be 3.2g N since the 3.2kg mass does not fall.
This force is the centripetal force causing the 1.1mass to move in a circle

You can consider the 1.1mass alone

For circular motion
T = mv^2/r
You know T, m and r so solve for v

Answer 2

you should draw this.