<p>(a) If a flea can jump straight up to a height of 0.350 m, what is its initial speed as it leaves the ground? How long is it in the air?</p>
<p>I did 0.35= 1/2 9.8 * t^2, but i am not sure if that is right. I need to know how long it was in the air.</p>
<p>thanks</p>
<p>(final velocity)squared=(initial velocity)squared+2<em>acceleration</em>distance</p>
<p>At the top of its trajectory, the flea's velocity will be zero, so we'll call that V.F.
Therefore:</p>
<p>0=(v)squared+2<em>(-9.8)</em>(.350)
(initial velocity)squared=6.86
initial velocity= 2.619 m/s</p>
<p>V.F.=V.I. + acceleration<em>time
0=2.619 +(-9.8)</em>time
time=.267 sec to reach max. height</p>
<p>multiply by 2 for total time in air</p>