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April 18, 2014

April 18, 2014

Posted by **gaby** on Thursday, December 4, 2008 at 9:33pm.

3. if the diver in item 2 leaves the board with an initial upward speed of 2.00 m/s find the divers speed when striking the water.

i dont know how to start these two at all...i dont need the answer i just need the formulas that i use for it...i dont understand which ones to use.. plz help

- physics!-concervation of energy equations -
**DanH**, Thursday, December 4, 2008 at 9:36pmyou can use:

(vf)^2 = (v0)^ + 2as

where vf is "final velocity"

v0 is "initial velocity"

a is acceleration

and s is distance

- physics!-concervation of energy equations -
**DanH**, Thursday, December 4, 2008 at 9:38pmwait...if this is conservation of energy, better to use:

convert the potential energy into kinetic energy! (sorry).

potential energy is mgh, and kinetic enery is (1/2)m*v^2

- physics!-concervation of energy equations -
**gaby**, Thursday, December 4, 2008 at 9:40pmlol wat do i do with that...do i put it equal to eachother

- physics!-concervation of energy equations -
**DanH**, Thursday, December 4, 2008 at 9:44pmSo, it depends on what you're currently studying. If you're studying equations of motion, then use my first suggestion, but if you're studying conservation of energy, use mgh = (1/2)m*v^2.

The m's cancel out:

So, gh = v^2/2. You can solve for v, the velocity, by setting h, the height, first to 5, and then to 10.

- physics!-concervation of energy equations -

- physics!-concervation of energy equations -
- oxgdkiwnp yqbmurxdt -
**oxgdkiwnp yqbmurxdt**, Monday, February 9, 2009 at 1:04amzklsvhmiy uxjarfh rvglzy vmai guhv wjkaqem gelfhdnt

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