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Physics Question

grantedingrantedin Registered User Posts: 193 Junior Member
edited September 2007 in AP Tests Preparation
Will you help me with #7 on page 10 from the link below?

http://lrt.ednet.ns.ca/corr_studies/pdf/sample_lessons/Grade_12/Physics_12.pdf
Post edited by grantedin on

Replies to: Physics Question

  • YanksDolphinsYanksDolphins Registered User Posts: 1,068 Senior Member
    I hope this method is correct:
    There are 3 forces on the sign, gravity, A, and B. The sign will have to be in equilibrium so we want the the net force to be 0 and all the forces to balance out. Instead of using the 30 degree angle, instead use it's complement of 60. The y-component of the tension is just the weight. We know that Ty = T sin 60 so we can easily solve for the tension of A, 500sqrt3. Applying the Pythagorean theorem, we can solve for Tx, which is 433 N. This should also be the tension in B as well. So 433 N. If I'm wrong, hopefully someone can correct it.
  • It'sGr82BeAGatorIt'sGr82BeAGator Registered User Posts: 513 Member
    Yeah, that's right
  • grantedingrantedin Registered User Posts: 193 Junior Member
    Thank you so much for your help. I am taking physics as a junior. AP Physics is not offered at my school. Prerequisite for this class is Honors Algebra 2.
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