Calculate Minimum Vertical Velocity for Salmon Jumping 1.9m Waterfall

AI Thread Summary
To calculate the minimum vertical velocity required for a salmon to jump a 1.9m waterfall, the final velocity (Vf) at the peak of the jump is 0 m/s. The acceleration due to gravity (a) is 9.8 m/s², and the height (dy) is 1.9m. Using the formula Vf² = Vi² + 2ad, the initial velocity (Vi) can be determined. The discussion emphasizes the importance of understanding the variables involved in the calculation. Clarification on the final velocity being zero is key to solving the problem accurately.
inner08
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In its final trip upstream to its spawning territory, a salmon jumps to the top of a waterfall 1.9m high. What is the minimum vertical velocity needed by the salmon to reach the top of the waterfall?

There seems to be some piece of information missing.
I know that:
a = 9.8 m/s^2
dy = 1.9m

I'm thinking i'll probably be using the formula (Vf^2 = Vi^2 + 2ad) so that would mean I need to have the Vf or the Vi. Would either of these be equal to zero?!

Any help is appreciated!

Thanks,
 
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You do know the final velocity. How fast will the salmon be traveling vertically if it only just reaches the top of the waterfall?
 
I guess it would have to be 0 if it only just reaches it. Sorry, I'm not very good with word problems.
 
inner08 said:
I guess it would have to be 0 if it only just reaches it. Sorry, I'm not very good with word problems.

You're right.

No need to apologise, I like formulae better myself, it's much harder to missinterpret a formula! :smile:
 
Thanks for your help :).
 
No problem :smile:
 

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