Centripetal Acceleration Here is my question: > You are whirling a ball attached to a string such that you describe a circle of radius $75$ cm, at a velocity of $1.50$ m/s. What is the acceleration of the ball? Could you show an equation to solve it? My idea: $$F_{\text{centripetal}} = \frac {v^2}{r}m$$ Regards!

$$F=ma=\frac{mv^2}{r}$$ $$a=\frac{v^2}{r}$$