1. The problem statement, all variables and given/known data what force is required to give a projectile weighing -475 N an acceleration of 3.00x10^3m/s^2 2. Relevant equations f=ma 3. The attempt at a solution f=ma -175 N=m (-9.81m/s^2) m=48.4 Kg f=ma f=(48.4kg)(3.00x10^3m/s^2) f=145000 N hi thanks so much for your help, I'm just wondering if I have completed this correct. I'm am just confused because it says that the projectile weighs -475 N so I have to change that into it's mass then into it's force. thank you. have a good night.