Recent content by rockmorg

Hey all, thought I should ask about a couple problems... 1 - A rotating door is made from four rectangular glass panes, as shown in the drawing. The mass of each pane is 95 kg. A person pushes on the outer edge of one pane with a force of F = 80 N that is directed perpendicular to the pane...

I'm going to reply to my own post and let everyone know I did a nifty search and found help for my problems, yay! Thanks to all those who checked out my post... - Morgan

Hey all I have a couple questions about some homework that I've been working on... 1 - The warranty on a new tire says that an automobile can travel for a distance of 98,000 km before the tire wears out. The radius of the tire is 0.35 m. How many revolutions does the tire make before wearing...

Hey guys - Here is a problem I have been working on... I've tried several things, I think I'm pretty close... Stone has a mass of 7e-3 kg and is wedged into the tread of a tire. Coefficient of static friction between each side of tread channel is 0.74. When the tire surface is rotating at 18...

Sounds complicated.. heh. I'll try and trudge my way thru it and see if I can make more sense of it... thanks for the input

Hey all - I've got a problem that's rather encompassing... The second hand and the minute hand on one type of clock are the same length. What is the period T of the motion for the second hand and for the minute hand? It goes on to say the centripetal acceleration is given by a_c =...

Hey again all - I think I have another problem where my math skills just aren't cutting it -- Kitchen gadget that dries lettuce leaves by spinning them, the radius of the container is 10 cm and it is rotating at 1.9 revolutions per second. Magnitude of centripetal acceleration at the wall...

Ahhh thanks much - so I guess it was just a matter of arranging my equation? The mass needs to multiply out to those other variables for it to work...

I have a question on what it is I might be doing wrong here... I've tried this answer in the grader and it is wrong... At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer...

hmmm okay I'm seeing it is not the same as the other problem that I thought was the same... so your answers make sense. thanks guys!

I have to be missing something... because there is a similar problem where they basically (diff. numbers) make it (7500)cos70 = y

Hey all - I'm going insane because I can't think of how to do this... I can't for the life of me get this straight... I have a triangle that I'm trying to solve for the hypotenuse, angle theta is 70 degrees and I know the adjacent leg is 7500. Cosine SHOULD solve for the hypotenuse, right...

But isn't it only going horizontally? so the acceleration would be in the y direction, and this is x...

I had a test question that went like this: Projectile is launched horizontally with an initial speed of 50 m/s. It started from rest, what is the acceleration after 3 seconds? For the life of me I couldn't come up with a velocity final or distance to find the acceleration, is there...

Hey all - I'm just looking for some help on an algebraic equation, I seem to have forgotten how to isolate t from this type of equation -- x = v_0t + 1/2at^2 What do you all think? Thanks!