1. The problem statement, all variables and given/known data [PLAIN]http://img718.imageshack.us/img718/5747/wtfproblem.png [Broken] 2. Relevant equations 3. The attempt at a solution I can't start because I have no idea what the heck ".470mg" means. I thought .470 times accel due to gravity, but that doesn't make sense, because then what is m? Or is it just .470mg as in .470 milligrams? :P F = ma F = .470(m)(9.8) That makes no sense because it just wops the equation. How could the force equal .470 times the mass, THEN times the acceleration? That's just wrong. So, what the hell are they talking about??? What is the *actual* force in, ya'know, newtons/a unit of force/something sensible?