Chapter 5.7, Problem 43ES

Assume that a free-fall model applies. Solve these exercises by applying Formulas $\left(15\right)$ and $\left(16\right)$ . In these exercises take $g=32{\text{ ft/s}}^{\text{2}}$ or $g=9.8{\text{ m/s}}^{\text{2}}$ , depending on the units.

A model rocket is launched upward from ground level with an initial speed of $60\text{ m/s}$ .

(a) How long does it take for the rocket to reach its highest point?

(b) How high does the rocket go?

(c) How long does it take for the rocket to drop back to the ground from its highest point?

(d) What is the speed of the rocket when it hits the ground?