- #1

karush

Gold Member

MHB

- 3,269

- 5

$\textit{a. what is the maximum upward speed she can give a ball }$

$\textit{without letting the ball hit the ceiling.$\displaystyle 6.26 \frac{m}{s}$}$

\begin{align*}

v^2&=2(9.8)(2)\\

&=39.2\\

v&=\sqrt{39.2}\\

&=\color{red}{6.26 \, \frac{m}{s}}

\end{align*}

$\textit{b. How long is the ball in the air before it is caught}$

answer is $1.25 s$ok I couldn't figure out b.

altho its simple