1. The problem statement, all variables and given/known data Someone pushes a crate with a force F at 21° below the horizontal. The crate weights 38 kg, and the coefficient of static friction between the crate and the ground is .57. Find the amount of force needed to move the crate. 2. Relevant equations f=ma Fs=([itex]\mu[/itex]s)(Fn) 3. The attempt at a solution First i tried to find Fn, so i multiplied the mass by 10, and got 380N. Then i added Fsin21 to find Fn.....thats about as far as i got haha i dont know what to do after that. i know i need F, but i dont know how to find what it is.