Posted by **bob HELP NEEDED HELP NEEDED HELP NEEDED** on Sunday, May 1, 2011 at 10:33pm.

a bootlenose dolphin jumps out of the water. the path the dolphin travels can be modeled by h=-0.2d^2+2d, where h represents the height of the dolphin in feet and d represents the horizontal distance.

a) assume that all energy is conserved. what is the initial velocity with which the dolphin leaves the water? round your answer to the nearest hundredth. (Disregard water resistance; g=32f/s^2

b) Convert the initial velocity to mph. Round your answer to the nearest hundredth. (1 mile= 5,280 feet)

- math -
**bobpursley**, Sunday, May 1, 2011 at 11:49pm
h=-.2d^2+2d

dh/dt=-.4d dd/dt+2dd/dt

so at max height, dh/dt=0

0=(-.4d+2)dd/dt

but dd/dt is the horizontalveloicy, it can be anything. d=5ft

So without knowing horizontal velocity, I don't know how you can solve for initial velocity.

## Answer This Question

## Related Questions

- math - a bootlenose dolphin jumps out of the water. the path the dolphin travels...
- math - a bootlenose dolphin jumps out of the water. the path the dolphin travels...
- physics - A trained dolphin leaps from the water with an initial speed of 12 m/s...
- Math Geometry - Please check my answers! - There's a line graph with 3 dolphins...
- physics - A dolphin experiences a force of 320 N [up] when it jumps out of the ...
- Physic - A dolphin experiences a force of 320 N [up] when it jumps out of the ...
- math help please - Dolphin 1 dove 200 feet under water. Dolphin 2 dove 30% ...
- help on math - Dolphin 1 dove 200 feet under water. Dolphin 2 dove 30% farther...
- math - A dolphin is swimming with her friend. The dolphin jumps to a height of 4...
- Physics - A dolphin jumps with an initial velocity of 13.0at an angle of 44.0 ...

More Related Questions