Question

The spring has a spring constant of 1000 N/m. It is compressed 15 cm, then launches a 200 g block. The horizontal surface is frictionless, but the block's coefficient of kinetic friction on the incline is 0.20. What distance d does the block sail through the air?

Answer 1

$\frac{kx^2}2=\mu mgd,$

$d=\frac{kx^2}{2\mu mg}=28~m.$