Posted by Rychelle on Monday, November 21, 2011 at 8:55am.
Salmon often jump waterfalls to reach their breeding grounds. One salmon starts 2m from a waterfall that is 0.55m tall and jumps at an angle of 32°. What must be the salmon's minimum speed to reach the waterfall?

Physics  drwls, Monday, November 21, 2011 at 10:47am
The range R of the jump must be R = 4m, if the waterfall were not there. That correspopnds to a distance to maximum height (the waterfall top) of 2 m.
Using the equation for range:
(R/2) = (1/2)*Vo^2*sin(2A)/g = 2 m
Vo^2 = 21.8 m/s
Vo = 4.7 m/s
A is the launch angle. It gets doubled because 2sinA*cosA = sin(2A) appears in the equation for R.
Answer This Question
Related Questions
 Physics  Salmon often jump waterfalls to reach their breeding grounds. Starting...
 physics  Salmon often jump waterfalls to reach their breeding grounds. Starting...
 physics  Salmon often jump waterfalls to reach their breeding grounds. Starting...
 physics  HOW DO I DO THIS PLZ HELP I DON'T NEED U TO SOLVE I JUST NEED TO KNOW ...
 Physics  Salmon often jump upstream through waterfalls to reach their breeding ...
 AP physics  Suppose a Chinook salmon needs to jump a waterfall that is 1.50 m ...
 Physics  Suppose a chinook salmon needs to jump a waterfall that is 1.32 m high...
 PhYsIcS  need help solving these problems. I tried but my teacher did not ...
 physics  In attempting to jump up a waterfall, a salmon leaves the water 2.0 m...
 physics again  A Chinook salmon has a maximum underwater speed of 3.58 m/s, but...
More Related Questions