Hi I'm new here, I hope someone can help me. I think I got the first half of the question, but I got stuck one the second part. Well here it goes, A force of 40N accelerates a 5.0kg block at 6.0m^2 along a horizontal surface. a.) How large is the friction force? b.) What is the coefficient of friction? a.) Fnet= ma Fp-Ff= ma (40)-Ff= (5)(6) 40-Ff= 30 40-30= Ff Ff= 10N I know that you have to use Ff= (mu)Fn, but how do you get Fn? And is there a way to show symbols like mu?