home > q&a board > physics > topic: rotational equilibrium- heeelp!!!

Q BgQuestion:

Pupil
Karma Points: 50
Respect (100%):
posted by  KAT007 on 5/9/2008 12:34:33 AM  |  status: Live  

Rotational Equilibrium- Heeelp!!!

Course Textbook Chapter Problem
Algebra Based Physics Holt Physics (1st) by Serway, Faughn 8 N/A
Question Details:
A 42 kg child and a 35 kg child sit on either end of a 4.2 m long seesaw.
1) Where along the seesaw should the pivot be placed to ensure rotational equilibrium?
2)  Suppose a 22 kg child sits 0.4 m from the 42 kg child.  Where must a 37 kg child sit to maintain rotational equilibrium?
Bonus Point Alert! Earn +2 additional karma points for helping this monthly member.

AAnswers:

Answer Question
Oracle
Karma Points: 153,340
posted by monica menchaca on 5/9/2008 2:49:44 AM  |  status: Live
Asker's Rating: Lifesaver   
KAT007's comment:
"Thank you sooo much! You are wonderful!"
Response Details:
The necessary condition for rotational equilibrium is that the net torque about any axis must be zero.
 
the pivot is approx. 1.91 to the right of the person that has a mass of 42 kg or if you prefer
2.29m  to the left of the person that has a mass of 35 kg.
 
 
For the other question you need to do a similar diagram with the new information and make the
operation 
 
Answer Question
Ask New Question

Join Cramster's Community

Cramster.com brings together students, educators and subject enthusiasts in an online study community. With around-the-clock expert help and a community of over 100,000 knowledgeable members, you can find the help you need, whenever you need it. Join for free today » How Cramster is different than tutoring »

Need Help In

Useful Links