Question

A ball is launched from the lab table, with an initial velocity of 2.5 m/s. If the table is 0.7 m high, how far from the table does it land? How long does it take to land?

Answer 1

If $\alpha=0$ then

$v_{0x}=2.5 (m/s)$ and $v_{0y}=0$

$h=gt^2/2\to$

$t=\sqrt{2h/g}=\sqrt{2\cdot 0.7/9.8}=0.34(s)$ .Answer

$x=v_{0x}t=2.5\cdot0.34=0.85(m)$. Answer