Question

As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.89 m above the top of the ramp. If the amount of work done against friction is insignificant, determine his initial speed at point A.

Answer 1

mgh=1/2 mv^2 solve for v

Answer 2

The equation would be this since the mass is the same on both sides:

v=sqrt(2*g*h)