# kinetic energy of a projectile (velocity and time are not given)

**1. The problem statement, all variables and given/known data**

Hi!

Task is to calculate kinetic energy of a projectile and cannon recoil velocity.

known data:

-mass of antiaircraft cannon: 3t

-max horizontal distance: 4km

-mass of a projectile 2kg

barrels: 2

**3. The attempt at a solution**

Since there is no initial velocity or time or max height given i can’t find a way to start this.

http://ift.tt/1qicznM