Moment

Moment is a quantity that tells turning effect of a force about turning point. 

• TRUE
• FALSE

Moment is smaller when force is smaller

• TRUE

• FALSE

Moment is bigger if the force acts further  from turning point

• TRUE
• FALSE

Quantity of turning effect of a force does not depend of acting degree of force on object.

• TRUE
• FALSE

What is the anticlockwise moment acting on this crane?

• 80,000Nm
• 100,000Nm
• 120,000Nm
• 140,000Nm

What is the moment acting on the seesaw?

• 1.6Nm
• 15Nm
• 16N
• 4Nm

What is the net Moment?

• 0 Nm

• 4 Nm (clockwise)

• 30 Nm (clockwise)

• 30 Nm (anti-clockwise)

If the board is 2 meters in length, and and the girl on the left who is 45 kg is far away 0.8 meters from pivot point what is the mass of the girl on the right?

• 20 kg
• 25 kg
• 30 kg
• 35 kg

What is the moment produced by the 15 N?

• 15 Nm (clockwise)
• 150 Nm (anti - clockwise)
• 1.5 Nm (anti - clockwise)
• 0.15 Nm (clockwise)

State the principle of moments.

• When a system is in equilibrium, the sum of the total clockwise moment is equal to the sum of the total anti-clockwise moment about the same pivot.

• When a system is in equilibrium, the sum of the total clockwise moment is greater the sum of the total anti-clockwise moment about the same pivot.

• When a system is in equilibrium, the sum of the total clockwise moment is less than the sum of the total anti-clockwise moment about the same pivot.

• When a system is in equilibrium, the sum of the total clockwise moment is equal to the sum of the total anti-clockwise moment about the different pivot.