# College Physics 2.21 – Deceleration of a ball caught in a mitt

## Solution:

The formula in solving for the initial velocity is

$\displaystyle \text{v}_0=\text{v}-\text{at}$

Substitute the given values

$\displaystyle \text{v}_0=0\:\text{m/s}-\left(-2.10\times 10^4\text{ m/s}^2\right)\left(1.85\times 10^{-3}\:\text{s}\right)$

$\displaystyle \text{v}_0=38.85\:\text{m/s}$