Cart rolling down a ramp and flying off a table

[nicholz]

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?

 

[rock.freak667]

Yes your equation is correct, though since the ramp is 5m high and then the table is 3m high, shouldn't h₁=8m?