- #1

DatAshe

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## Homework Statement

Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behavior is called porpoising. Suppose a salmon swimming in still water jumps out of the water with velocity 5.87 m/s at 46.5° above the horizontal, sails through the air a distance L before returning to the water, and then swims the same distance L underwater in a straight, horizontal line with velocity 3.67 m/s before jumping out again.

(a) Determine the average velocity of the fish for the entire process of jumping and swimming underwater.

___________m/s

(b) Consider the time interval required to travel the entire distance of 2L. By what percentage is this time interval reduced by the jumping/swimming process compared with simply swimming underwater at 3.67 m/s?

_________%

## Homework Equations

V_avg =( x_1+x_2 )/ 2 , ΔX=V_x*t, Δy=V_oy+(1/2)a_y(t^2)

## The Attempt at a Solution

A) I got 5.86 m/s by finding the velocities of both parts (8.08m/s for the jump, 3.67m/s for the underwater part), adding them together and dividing by two, to get an average.

B) I got 45.5% by finding.....looking at my notes I have no clue how I got that. I apologize, but I have no clue what I did, and no clue how to do it correctly. Sorry for being a bum on this part:(