Question

A baseball flew 19.6 m straight up into the air after being hit by a bat. How long should it take for the ball to return from its maximum height?

2.00 s

1.91 s

1.02 s

3.99 s

Answer 1

$h=gt^2/2\to t=\sqrt{2h/g}=\sqrt{2\cdot 19.6/9.8}=2.00\ (s)$ . Answer