- #1

kashiark

- 210

- 0

## Homework Statement

A flea develops an acceleration of 2.0*10³m/s² during takeoff. After takeoff the flea reaches a height of 36mm.

a. How fast does the flea leave the ground?

b. How long does the take-off acceleration last?

## Homework Equations

d=d0 +(v+v0)t/2

d=d0+v0t+at²/2

v²=v0²+2a(d-d0)

g=-9.8m/s²

the 0's mean initial

## The Attempt at a Solution

I'm not sure if I'm supposed to incorporate gravity or not because fleas don't have wings, so the take off must just be the fly jumping, but if you incorporate gravity, the acceleration won't be constant, so none of these formulas will work! However, if I don't incorporate gravity, the flee would have a constant acceleration until 33mm when he just suddenly stops. That wouldn't make any sense... help?

If you guys just feel like being overly helpful, perhaps you could explain to me why the area under a curve is the displacement?