(adsbygoogle = window.adsbygoogle || []).push({}); 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 don't really know where to begin or if I'm doing them correctly. Heres an example:

A 700.0N window washer is standing on a uniform scffold supported by a verticle rope at each end. The scaffold weighs 200.0N and is 3.00m long. What is the force in each rope when the window washer stands 1.00m from one end?

This is what I've got for work:

L=3.00m

Theta=90 degrees

d=1.00m

Force of window washer (Fw)= 700.0N

Force os scaffolding (Fs)= 200.0N

Force of the ropes=Ft

T=Ft*L - Fw*(L/2) - Fs*d

T=Ft*3 - 200*(3/2) - 700*1

T=3Ft - 300 - 700

-3Ft= -300-700

-3Ft/-3= -1000/-3

Ft = 3.33*10^2N

I have no idea if any of it is right...I tried to follow th example in the book and that was as far as I got. There are a ton of similar problems in the book and on my test. If someone could please help... thank

Sidenote: This is my first Forum post so if the math and such is dificult to understand I'm sorry.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: HELP Rotational equilibrium material!

**Physics Forums | Science Articles, Homework Help, Discussion**