Hey guys I am a high school senior and this is my first year taking physics. I am really interested in the subject and like to find out real world problems for fun. One of the things I am trying to do is find my punching speed. I downloaded an acceleration app for my phone that displays the amount of felt g's using the accelerometer. I then tried to change this into m/s^2 and find out the speed of my punch and the force being exerted upon it. It came out to be around 110 m/s and about 748 N of force. I don't think that this is correct so I was wondering what I am doing wrong? Is my phone not accurate (more than likely) or do I need a different equation other than average acceleration and f=ma? If you want the equations I am using just ask and I will upload some photos.