Chapter 5.7, Problem 34ES

In these exercises assume that the object is moving with constant acceleration in the positive direction of a coordinate line, and apply Formulas $\left(10\right)$ and $\left(11\right)$ as appropriate. In some of these problems you will need the fact that $88\text{ ft/s}=60\text{ mi/h}$ .

A particle moving along a straight line is accelerating at a constant rate of $5{\text{ m/s}}^{\text{2}}$ . Find the initial velocity if the particle moves $60\text{ m}$ in the first $4\text{ s}$ .