Recent content by Planefreak

Now I really feel dumb... like the person who started the thread I messed up my limits. For some reason I thought phi was [0, pi/2] so when I finished everything I came up with just pi as a result. Once I fixed this it worked out to 2*pi

I'm kind of lost. I did all the work up to the very end and have just the limit function left but can't get it to work out. Can someone check this and let me know what else I need to do or what I messed up on? I have: 2\pi * lim (t \rightarrow \infty [ -e-t^2/2 * (t2 + 1) + 1/2 ] I...

Homework Statement xy' - (x+1)y = 0, y(0) = 5 Homework Equations Well all of the differential equation stuff seems relevant to me. But from the beginning dy/dx + P(x)y = Q(x) and yeintegral(P(x)dx) = integral(Q(x)eintegral(P(x)dx)dx + C. The separation of variables M(x)dx + N(y)dy =...

Homework Statement Three 8kg spheres are located at (0, 1.7), (1.7, 1.7), and (1.7, 0) named A, B, and C respectively. What is the net gravitational force acting on sphere A? Homework Equations F = GMm/r2 The Attempt at a Solution So far I've tried this several ways with no...

Homework Statement You fire a squirt gun horizontally from an open window in a multistory building and make note of where the spray hits the ground. Then you walk up to a window 5.0 m higher and fire the squirt gun again, discovering that the water goes 1.5 times as far. Ignore air...

I got it. I used the Vx velocity which was easy to find then found the height assuming that it is landing at the same height and used tangent to find the final velocity vector. Thank you.

Homework Statement A gun fires a round that goes 122 km in 170 seconds before impacting the ground. Ignore air resistance and the curvature of the earth. Find the muzzle velocity and angle. Homework Equations Vx = Vi(cos(theta)) Yx = Vi(sin(theta)) t= (-2Vy/-9.8) and...

Homework Statement A ball is thrown horizontally from the top of a building at 45.6 m/s. We want to know how long it takes for the ball to drop below an angle of 13 degrees. Ignore air resistance. Homework Equations I'm assuming the projectile equation is necessary (delta)y = Vyit +...

Thanks, got it. I missed the obvious.

Homework Statement Basically, a car accelerates at -5.2 m/s² and is traveling at 45 km/h. Homework Equations How many meters will it take for the car to stop. The Attempt at a Solution I was using some online material and found a few equations. I found the time it takes to for...