Moments

• $moment\ =$$\ force\ \times perp.\ dist.$
• If a situation is in equilibrium, the anticlockwise moments will be equal to the clockwise moments
• Three things to do in moments questions:

  1. Resolve up and down
  2. Resolve left and right
  3. Take moment about 1 point
• Calculate a moment by identifying + calculating forces that are going clockwise and anticlockwise.
• Label the moment:

  A) 2a sin theta

  B) a cos theta