Question

a 50.0kg block slides down a frictionless incline. if the block starts from rest and has a speed of 3.00m/s at the bottom, at what vertical distance did the block starts its descent?

Answer 1

Conservation of Energy:

\[mgh = \frac{ 1 }{ 2 }mv^2\]
\[h=\frac{ v^2 }{ 2g }\]
\[=\frac{ 9 }{ 20 }m\]