Rotational equilibrium Definition and 67 Threads

Hi- I have a homework question for physics. i have read the chapter in the book on it and have studied my notes and everything. i have been trying different ways for hours but i am unable to get any where. if you could help me get started on this problem that would be wonderful. i thought...

Homework Statement A hanging 4 kg mass is connected by a weightless cord on a pulley to a 3 kg mass which rests on a smooth surface. The pulley has frictionless axle and I=.5kgm^2 and r=.3m. The cord does not slip on the pulley. Find the acceleration of the two masses and the tensions of the...

http://img95.imageshack.us/img95/9403/problempi4.png I know this problem isn't hard, but I can't reach the final answer in the back. OK, so if we project the forces along the x and y axis, we can easily conclude that: F_(T,2) + F_(T,1) * sin50 = 10 F_(T,1) * cos50 = P from here, though, I...

I'm having a hard time with this rotational equilibrium problem: There is an attached image that shows the free-body diagram. The arm in the figure weighs 36.0 N. The force of gravity acting on the arm acts through point A. Determine the magnitudes of the tension force Ft in the deltoid...

Hi there, This is my first time on this great board, I hope I can get some help! I've tried both of these torque and equilibrium questions, but cannot find the required variable. (I've tried summing forces in the x and y) Please help...

I am currently studying Rotational Equilibrium and Dynamics in Physics. Our class was given a competitive lab project for extra credit, where the group with the lowest margin of error would win. It is set up as following: You will be given a meter stick and one weight (approximate value of...

One end of a uniform 4.00-m-long rod of weight w (Fg) is supported by a cable. The other end rests against the wall, where it is held by friction. The coefficient of static friction between the wall and the rod = 0.500. Determine the minimum distance x from point A at which an additional...

A 10.0-kg solid uniform cube with 0.250-m sides rests on a level surface. What is the minimum amount of work necessary to put the cube in unstable equilibrium? My understanding is that the cube has to be on one of its sides with it's center of gravity directly above it. However, I don't know...

Rotational Equilibrium and Dynamics - :) I'm totally stumped! --------------------- A skater spins with an angular speed of 12.0 rad/s with his arms outstretched. He lowers his arms, decreasing his moment of inertia from 41 kg·m² to 36 kg·m² Calculate his initial and final rotational...

Please help me with these problems: 1) In a circus performance, a large 4.0 kg hoop with a radius of 2.0 m rolls without slipping. If the hoop is given an angeular speed of 6.0 rad/s while rolling on the horizontal and is allowed to roll up a ramp inclined at 15 degrees with the horizontal...

1) If you go to this site it has the question already set up. the one I need help on is question number 62, the picture frame one. I know that the answers are already given but I want to know how this is set up. http://www.phys.uvic.ca/vannetten/phys102/Assignments/t1a9p.pdf 2) A uniform...

In my lab assignment, we used an equal-arm balance to demonstrate rotational equilibrium by balancing torques using different mass quantities. A 100 g mass hangs from one end of the EAB, and a 185.18 g mass hangs from a thread at a 50 degree angle on the other end. The EAB is horizontal and we...

Author: Dr. Donald Luttermoser of East Tennessee State University

The lightweight pivoted bar in Fig. MC8 will be in rotational equilibrium when a 200 N force acts none of these up at C only down at E or up at C up at B down at D (see attatched picture) So the net force has to be 0, i wasnt exactly sure how to do this one because i...

the following four questions were from my test that i recentally took and i miss the day that we went over them and didn;t get the answers and haven;t had to time to check with my teacher about them, so i need some help on what the answers would be. thanks. 1. If the torque required to...

HELP! Rotational equilibrium material! HELP!---Okay, I am having some issues grasping the concepts of rotational equilibrium and dynamics. Specifically the equations: T=I*alpha L=I*omega T*delta t= delta L W=T*theta P=T* omega And there are also problems that I can't understand so I...

Ah jeeze, I am so sorry to be posting up three questions. I don't mean to just get answers for my homework, but would anybody be willing to lead me in the right direction regarding these physics problems? I have the solutions, but I am unsure on how to get them. Thank you, anything helps...