Recent content by Guni22

Thank you =)

Wow thank you for replying, I thought this thread was dead. So, I'm trying to generalize what you said. When 3 or more members frame into a single joint, the force contributed by each member is considered in the free body diagram of every other member (with flipped directions)? Edit: And I'd...

Thanks for the reply, Am I missing something, or is it not being considered as an external force for the case of BCD. All I see is Dx and Dy, and I'm wondering why T isn't there.

In this question and solution: http://imgur.com/Z8DMo Why is it that when we examine the bar BCD, the force exerted by the bar AD, TAD , is not considered in the free body diagram, but when you examine the bar DFG, it is considered in the free body diagram?

Malus's Law is an equation that describes how much light intensity that a beam of light will lose if if it goes through a polarizer, dependent on what angle the polarizer is at relative to the light. It is explained better than I ever could here...

Hello Physics Forums, complete astronomy noobie here. My question is about how a main sequence star turns into a red giant and starts expanding. Reading from here http://en.wikipedia.org/wiki/Red_giant "When the star exhausts the hydrogen fuel in its core, nuclear reactions in the core stop...

There is a tricep machine which is basically a pulley, with some rope connected to a stack of weights and a bar for you to push down on using your triceps on the other end of the rope. How is it possible that if I'm 140 pounds, I can lift like 180 or more on that machine? If I want to want...