Torque and force

  • #1
hey. I got a bunch of questions based on this idea, so i wanna make sure i got it right before i do everthing.
lets say i got a board sitting between 2 supports A & B. with a length L and a centre of mass x from A. i need to find the force of both endpoints on the supports.
would it be forceA = mg(L-x)L and forceB = mg(x)L ?

thanks
 

Answers and Replies

  • #2
168
0
Almost. Taking moments about the two supports and you get.

forceA=mg(L-x)/L and forceB=mg(x)/L

A quick way to check this is that for static equilibrium the downwards forces must equal the upwards forces. In this case, forceA + forceB = mg
 
  • #3
oh geez. that IS actually what i had done. Honestly. Why won't u believe me?!!!!!
I just switched it in my head going from paper to computer.
 

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