Recent content by bungie77

ahhh yeah of course. and since the tension is obviously greater in block A the signs are opposite to block C. thanks :)

Here is a diagram of the question.

well I've been doing that but i can't seem to get the right answer... i was wondering if maybe i was screwing something up with the directions... so far I've come to the following; for block A; Fx = T - Uk*N = mA*ax Fy = N - mA*g = 0 So essentially, Fx = T - Uk*mA*g = mA*ax For...

*this is the link to the picture in case the thumbnail doesn't work http://img214.imageshack.us/my.php?image=pulleysystemph6.jpg

Homework Statement http://img214.imageshack.us/img214/6531/pulleysystemph6.th.jpg Homework Equations sum of forces The Attempt at a Solution So I tried summing the forces in the x-direction where m*a (block a) = -Ff + T = m(block a)*g*u + m*a(block b) + m*g(block b)...

Yeah I can calculate that. Perhaps I didn't phrase the question well (although I just copied it from the sheet). There is a trailer truck sitting on top of the flat car. The boxcar runs into the flat car and they form a couple. I can calculate the velocity immediately after, but what the...

ok so perhaps I could set it up like this: m*v(of coupled pair) = m*v(of boxcar) + m*v(of new coupled pair flatcar and trailer truck) But I have two unknowns being the two velocities of the boxcar and the new coupled pair.

Homework Statement A 40-tonne boxcar A is moving with a velocity of 7.2 km/h when it strikes, and is automatically coupled with, a 12-tonne flatcar B which carries a 20-tonne trailer truck C. Both the flat car and trailer truck are at rest with their brakes released. What is the velocity of...

That is a lot simpler! Thanks for your reply that method makes sense to me and I get 960km/hr which I assume is correct. As for the other method though I am still a sketchy.

yeah i understand that. sorry don't crucify me i just wanted to show i had not just gone straight here for an answer. i really just wanted a point in the right direction as was done by the previous poster. thanks for your comment and ill have a better look at the problem and post back soon.

The picture should be a thumbnail linking to here: http://img90.imageshack.us/my.php?image=planeqc1.jpg My apologies if your browser was unable to view it.

Homework Statement http://img90.imageshack.us/img90/2456/planeqc1.th.jpg This is the question. Homework Equations I am unsure how to relate the velocity of the plane to the angular velocity. The Attempt at a Solution I calculated r to be 11 540m. Therefore the distance in the i...