Question

A boy on a slide 3 meters high has a mass of 55 kg. He begins sliding down with an initial speed of 2 m/s and slides down the slide assuming the slide is frictionless, what is the boyʼs final speed?

Answer 1

\[mgh = 1/2*m v ^{2}\]

Answer 2

the masses cancel each other out. solve for v, and you will get the velocity by the conservation of energy

Answer 3

but i found a problem and is the inital velocity. . ..