Question

In a ballistic pendulum experiment, projectile 1 results in a max height,h, of the pendulum equal to 2.6cm. A second projectile (of the same mass) causes the pendulum to swing twixe as high, h2 = 5.2cm. The second projectile was how many times faster than the first?

Answer 1

So far I know that \[M _{projectile1}=M _{projectile 2}\]
h1 = 2.6cm
h2=5.2cm

I'm guessing that I'll need to get the displacement between the two projectiles.

So would I need this formula:
\[v=\sqrt{2g(y_{0}-y _{}}\]