:( static friction force? mew? do what now?? Okay, thanks for helping me first off. Second, i was absent :( and now I'm pretty confused on a few problems that do with force. the first of four problems, i dont understand, like, what exactly is mew? ok .. 1. a 225 kg crate is pushed horizontally with a force of 710 N. If the coefficient of friction is .20, calculate the acceleration of the crate. Heres what ive done: 225 kg= F sub g 710 N= F sub p a = ? now is the coefficient of friction static or kinetic? does it matter?