Recent content by alyston

Homework Statement d2y/dx2 = 2-6x Given: y(0)=-3 and y'(0)=4 Homework Equations None that I know of. The Attempt at a Solution I know that for a single order derivative you would just find the integral, set y=1 and x=0. But I'm confused because here we're given two...

Oh, whoops, I didn't notice that. Thanks for pointing that out. So I went back and redid some of my calculations: W=(1/2)(2100)(3.8^2)= 15,162 J (9.81)(2100) * sin 20 = 7046 N 7046 N-4000N=3046 N 15,162/3046=4.98 m Hmmm...it's still a little off. Am I using the right equations?

Homework Statement A 2.1*10^3 kg car starts from rest at the top of a driveway that is sloped at an angle of 20° with the horizontal. An average friction force of 4.0*10^3 N impedes the car's motion so that the car's speed at the bottom of the driveway is 3.8m/s. What is the length of the...