Posted by Dawnn Oneil on .
A string 1.5 m long breaks when its tension is 100 N.
a. What is the greatest speed with which the ball can be moved around a horizontal circle if the ball has a mass of 2 kg?
b. Find the speed for the same setup, but for a vertical circle.

Physics 
bobpursley,
In a vertical circle, max tension is at the bottom.
Tension=mg+mv^2/r
solve for v
In a hoizontal circle, tension is more complicated.
Tension=m * sqrt((v^2/r)^2+g^2)