# Rotating object: Finding Tension and Vtheta

bjno8

## Homework Statement

A string with 2kg mass m on the end is connected to a bar that rotates at a constant rate (theta dot). The string makes a constant angle beta, = 60 degrees relative to the horizontal plane. Find theta dot and the tension force in the string.

## The Attempt at a Solution

I realize this may be very difficult to understand without a picture, but the rotation is in the x y direction I suppose and gravity is acting downward in the Z direction. I'm not really sure how to go about this problem. There's a specific velocity that will give the angle relative to the x-axis the 60 degrees but I'm quite stuck, any help would be great.

bjno8
Maybe this is right?

Ok so after fighting through it again, I realized what might work...

F(z) = 0; Tcos(30) - 2kg*9.81 = 0: T = 22 N

F(n) = ma(n); 22sin(30) = 2(v^2/1.57)

I realized I also forgot to mention the p value: 1.57