Question

How fast do you need to swing a 180-g ball at the end of a string in a horizontal circle of 0.6-m radius so that the string makes a 35∘ angle relative to the horizontal?

Answer 1

there is a tension in string its vertical component:Tsintheta=mg while Tcostheta=mv^2/r dividing equ1 by equ2 gives:tantheta=gr/v^2 tan35=10*0.6/v^2 v^2=8.57 v=2.93m/s