- #1

elcaptain

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## Homework Statement

a ball of 2.5kg revolves in a circle on a string with a radius of 0.9m. at the moment when the string makes an angle of 60 degrees below the horizontal, the ball's speed is 7m/s. at this specific point, what is the tangential acceleration?

## Homework Equations

A_t = r*angular acceleration

A_t = dv/dt

## The Attempt at a Solution

I understand what tangential acceleration is and how to calculate it when a time interval is given. However, this scenario doesn't make much sense, and I can't find an equation to use that I could plug in some of my data. I know m*g*cos60 is the gravitational acceleration component that is tangent to the ball's circular rotation at that point in time, but that answer didn't work for tangential acceleration.

## Homework Statement

## Homework Equations

## The Attempt at a Solution

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