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**Verticle height. Please help!**

**A 12.0 g rifle bullet is fired with a speed of 360 m/s into a ballistic pendulum with mass 6.00 kg, suspended from a cord 70.0 cm long.**

Compute the vertical height through which the pendulum rises in cm.

Compute the vertical height through which the pendulum rises in cm.

How would you find the verticle height? I have the equation KE=(sum of the masses)(gravity)(h) to find it but I get 13.23 and that's not right. I found the initial kenitic energy of the bullet to be 778J and the kinetic energy of the bullet and pendulum immediately after the bullet becomes embedded in the pendulum to be 1.55J.

Can someone please help me?