Burke, sorry to do this, but YOU ARE WRONG!
Force = mass x acceleration.
The more useful calculation, though, is the one for kientic energy. Kinetic energy is the energy in a moving object.
Ek = 1/2MV2 Kinetic energy equals Mass times velocity squared, all divided by 2. increases in velocity can make up for lower masses quite a bit, since the velocity component is squared. Ever wonder why little Bruce Lee could generate so much power? His speed was the key.
This calculation isn't the only thing, however. As Justin, the resident Super Ranger told us, design of the moving object is VERY important. A baseball and a drinking glass of the same wight travelign at the sam espeed will hurt to different degrees when they strike your noggen. Why? The ball will transfer more of that kinetic energy into your noggen. A titanium hawk moving fast with great edge geometry, a sharp edge, and a forward balance will REALLY sock it to a bad guy.
Off to watch Last of the Mohicans (sorry for spelling) to see some hawks as I lust after a Next Gen Ranger, I remain, Crayola.