Question

Using conservation of energy, find the speed v_b of the block at the bottom of the ramp.
Express your answer in terms of some or all the variables m, v, and h and any appropriate constants.
I would think it would be square root of v^2+2gh but its telling me no

Answer 1

PE=KE (if there is no friction)
mgh=mv^2/2
v=sqroot(2gh)

Answer 2

vb= square root v^2 +2gh

Answer 3

The correct answer is:

vb= square root (v^2+2gh)

Do not forget the parenthesis under the square root sign!