If a cart rolled down a ramp 5 meters high and flew off a a table at 3 meters high, what would its velocity be?(adsbygoogle = window.adsbygoogle || []).push({});

please let me know where i go wrong, i was using the law of conservation of energy

mgh_{1}=mgh_{2}+1/2mv^{2}

mg(h_{1}-h_{2})=1/2mv^{2}

v=square root of 2g(h1-h2)

where h1=5 and h2=3

i plugged in numbers for the variables and i can't seem to get it to work out. is the equation i came up with correct?

edit: i was thinking that it should come out to the square root of 2gh. would that be right though? can i consider the release height to be the "0" height here?

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# Homework Help: Question about the Conservation of Energy

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