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? please let me know where i go wrong, i was using the law of conservation of energy mgh1=mgh2+1/2mv2 mg(h1-h2)=1/2mv2 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?