Recent content by yue_

Thanks for replying. I did get that acceleration and a very close Wnet (8820 J) when I worked it previously, while using the method you demonstrated. For Ff, is Fn=m*a? Or m*g? That's what I'm confused about...

Homework Statement There is a 2450 kg car being pushed by a group of students. The car is pushed a distance of 12 m in 8.95 seconds. The coefficient of friction is .450. a) What is the net work being done? b) Work done by street? c) Work done by students? Homework Equations Wnet=Kf-K0...

Homework Statement Rewrite sin^4 xtan^4 x in terms of the 1st power of the cosine. Homework Equations sin^2 x=(1-cosx)/2 tan^2 x=(1-cosx)/(1+cosx) The Attempt at a Solution For this problem, I tried to rewrite tan^2 x as (sin^2 x/cos^2 x) But then I ended up with a...cubic...