Week 4 ENG1011 PASS - Rigid Bodies

Which direction usually defines a positive moment?

• Clockwise

• Anti-clockwise

What is the moment arm (perpendicular distance) of the 20N force from point P?

• 1m

• 2m

• 3m

• 4m

What is the resultant moment around point P?

• -50Nm

• -30Nm

• -10Nm

• 10Nm

What is the resultant moment around point A given L = 4m?

• 218.78N

• 276.63N

• 418.78N

• 268.63N

Match the following supports

• Roller

• 
• Fixed

• 
• Pinned

• 

What is the magnitude and direction of the moment at the fixed support that is needed to keep the system in equilibrium?

• -160kNm

• 80kNm

• 320kNm

• -480kNm

What are the vertical support reaction forces needed to keep the system in equilibrium? (Hint: Find moments around point A to find the reaction at point B)

• Ay = 3.44kN, By = 1.15kN

• Ay = 3440kN,
  By = 1150kN

• Ay = 5740kN,
  By = -1150kN

• Ay = 5.74kN, By = -1.15kN