Accelerating projectile force needed

[cheekibreeki]

Homework Statement

I need to accelerate a 0.2 gram projectile to 300 m/s within 80cm. How much force (N) do I need?

Homework Equations

E = F * S

The Attempt at a Solution

 

[Ryan Hwang]

There is no attempt at a solution.

 

[haruspex]

You know a mass a velocity and a distance, and you wish to determine a force. You have quoted an equation involving energy, force and distance. What other equations involving some of mass, energy, velocity, force and distance do you know?