How high can a fish jump after breaking through the surface at a speed of 2.5 m/s?

1. Sep 26, 2008

mandaa123

1. The problem statement, all variables and given/known data
If a salmon swims straight upward in the water fast enough to break through the surface at a speed of 2.5 meters per second, how high can it jump above water?

2. Relevant equations
i dont know, because all i know is speed.

3. The attempt at a solution
is acceleration 9.81 in this? i dont know how to figure it out : [

2. Sep 26, 2008

AshesToFeonix

Re: how high can a fish jump after breaking through the surface at a speed of 2.5 m/s

the formulas you need are:

V final = V initial + A(t)

and

X final = X initial + V initial (t) + 1/2A(t^2)

where x is distance, v is velocity and a is acceleration (yes, 9.81 m/s^2)

write'em down, I'm sure they're in your book, and should get you started on all your problems.

3. Sep 26, 2008

Staff: Mentor

Re: how high can a fish jump after breaking through the surface at a speed of 2.5 m/s

You may as well approach the question from the conservation of energy side. Kinetic energy gest converted into potential during flight.