Question

A block sliding across a frictionless table encounters a region of rough surface
with a coefficient of friction of μ. What was the initial speed of the block if it
traveled a distance d before a complete stop?

Answer 1

There is a fórmula that says
Vf^2=Vo^2-2ad
Final velocity is zero because it stops so
Vo^2=2ad
Vo=√(2ad)

Answer 2

a= acceleration
D= distance
Vf=final velocity
Vo=initial velocity

Answer 3

So you have to find the acceleration using dynamics

Answer 4

Yes thank you, but our teacher wants us to use Energy of Conservation.

Answer 5

Then the mechanical energy at the top must equal the mechanical energy at the bottom.