Question

a 2kg ball on a string is rotated about the circle of radius 10m the maximum speed of the ball

Answer 1

man!! I solved this problem before! I think u forgot to mention tension of the string! it is 50N
then u can use the formulae T=mv^2÷R to find the max speed!!!
if I'm wrong please don't regret! let me know if I'm wrong!
thank you

Answer 2

T=mv^2÷R use it to get the answer