Recent content by PinkDaisy

I'm having a problem with the following question: A coin with radius R rolls up a plane which is inclined at an 25 degrees above the horizontal. The coin starts up the incline with an initial angular velocity of 70 rad/s and rolls in a straight line without slipping. How far will the coin...

Isn't there also a component due to gravitational potential energy? Does the equation start out looking like this: .5m(1)v(1)^2 + m(1)gy + .5kx^2 + .5m(2)v(2)^2 = .5m(1)v(1)^2 + m(1)gy(init) + .5kx^2 + .5m(2)v(2)^2 0 + m(1)gy + .5kx^2 + 0 = .5m(1)v(1)^2 + 0 + 0 + .5m(2)v(2)^2 How...

The problem is: A spring that is compressed 0.5m by a block (block1) are at the top of a 10m tall frictionless hill. The block is released and slides down the hill where it collides with block2, which started at rest. (a) What is the speed of block1 prior to the collision? (b) Find the...

Thanks so much!

My problem is: A particle is acted on by a force, F=-(5yx^2)i + (4y^3)j Calculate the work done by F as the particle moves from point (-2,4) to point (5,10)? F is in Newtons and all x's and y's are in meters. I think that I need to integrate each piece using the points as limits, but I'm...

Oops, you are exactly right. The excitement from finally conquering the problem caused my fingers to malfunction! Thanks for the help!

OHH! I think I finally got it! I took both of the \sum Fx equations and solved them for ma then set them equal to each other and then solved for f. f=ma and (P-f)/2=ma f=(P-f)/2 P=f/3 I was confused by the question, I thought that it wanted me to solve for \mu, but it was...

Sorry about no picture. It is a surface with two boxes stacked on each other with the smaller one on top. The force P pulls the bottom box to the right. These are my equations but then I don't know where to go. \sum Fy (M) = n1 - mg so n1=mg \sum Fx (M) = f1 = ma so \mu mg = ma...

The question is: "Two blocks are accelerated across a horizontal frictionless surface as shown. Frictional forces keep the two blocks from sliding relative to each other, and the two move with the same acceleration. What is the magnitude of the horizontal component (frictional force) of the...