Recent content by Dr_bug

okay i re-uploaded figure

oh yeah sorry i removed it when i reposted on the other page i'll put it back

okay I'll try...its just that this is an intro physics course and i didn't think about putting it elsewhere

Homework Statement Consider the dam in example 3. Suppose there is a rectangular gate near the top of the dam that can be used to release water. The gate is 4 m wide and 3 m tall and is hinged at its top edge so that it will close under its own weight. Determine the torque on the gate for...

so then can i just solve the eqn i was using and just ignore m?

Homework Statement A 320 N sphere 0.20 m in radius rolls, without slipping, 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the hill if it starts from rest? Homework Equations I sphere= (2/5)mr^2 atan=rα v=rω The Attempt...

Homework Statement Four masses are held in position at the corners of a rectangle by light rods.Find the moment of inertia of the system about the x axis.Find the moment of inertia of the system about the y axis.Find the moment of inertia of the system about an axis through O and...

well you actually do use center of mass to describe human movements because that's an example that my textbook uses...

Homework Statement Discuss when you can and can’t “pretend all the mass of an object is concentrated at the center of mass”. Homework Equations The Attempt at a Solution So I don't really understand what this is supposed to mean. I know that you utilize center of mass when trying...

so should I then take .79796 and square it and then divide by .1016 (thats the radius converted to meters)

sure (a): (4 in* 2.54 cm*75 rev*2pi rad)/(100 cm*60 sec*5 sec)= .1596 m/sec^2 -- I know its right because I already submitted it online and it accepted the answer. (b): (4 in* 2.54 cm*75 rev*2pi rad)/(100 cm*60 sec)= .79796 m/s -- this was also accepted

Homework Statement What is the tangential acceleration of a bug on the rim of a 8.0 in. diameter disk if the disk moves from rest to an angular speed of 75 revolutions per minute in 5.0 s? (b) When the disk is at its final speed, what is the tangential velocity of the bug? (c) One second...

uuh lol never mind i just had an extra negative sign

Homework Statement An electric motor rotating a workshop grinding wheel at a rate of 90 rev/min is switched off. Assume constant negative angular acceleration of magnitude 2.50 rad/s2. (a) How long does it take for the grinding wheel to stop? (b) Through how many radians has the wheel...

Ahh Geez... thanks I was going crazy