Recent content by iPhotonHQ

Wow, okay, I am sort of seeing what the problem is asking. Thanks! I thought for a moment that I needed to derive specific kinematic equations...

Homework Statement "Derive the equations for position (in terms of acceleration, initial position, initial velocity, and time) and velocity (in terms of constant acceleration, a, initial velocity, v0, and time, t) from the definitions of position, velocity, and acceleration (derivative...

< Mentor Note -- thread moved to HH from the technical math forums, so no HH Template is shown > I've encountered 2 problems in a row that involve lifting water out of tanks and finding the work needed. I am getting the incorrect answer. w = ⌠ab pgA(y)D(y)dy here is one of the problems: A...

w = ⌠.51.25 kx dx you can solve for k by plugging in known integral... 100 = ⌠0.5kxdx you should get k = 800

My problem was that I forgot hooke's law. F = kx I can apply it to the given information to find the target solution.

"It takes 100J of work to stretch a spring 0.5m from its equilibrium position. How much work is needed to stretch it an additional 0.75m." Attempt: w = ⌠abF(x)dx work = F x D 100J = F x 0.5m F = 200J 0.75 + 0.5 = 1.25 w = ⌠0.51.25 200dx w = 150 J The correct answer: w = 525 J what did I do...

Thanks that confirmed my answer!

Really the biggest prerequisite for physics in my opinion is calculus. Even though I've never taken a physics class in high-school, I am in a calculus based physics class currently for my community college. If you can gain an understanding of calculus which usually comes with practice at...

Homework Statement "The fastest measured pitched baseball left the pitcher's hand at the speed of 45 m/s. If the pitcher was in contact with the ball over a distance of 1.50m and produced constant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to...