Grade 11 Moment and Force

What is the unit of force?

• Meter

• Newton

• Newton meter

• Centimeter

Moment is a measure of the turning effect of a force.

• True

• False

Principle of moments states that an object is balanced when clockwise moments are equal to anticlockwise moments.

• True

• False

Moment = force / distance from pivot

• True

• False

What is the moment acting on the left side of the pivot?

• 2 Nm

• 20 Nm

• 200 Nm

• 0.2 Nm

The beam is balanced.

• True

• False

A force of 4 N acts on a lever 2 m from the pivot. What is the moment?

• 8 Nm

• 6 Nm

• 2 Nm

• 3 Nm

Jack has a weight of 300 N and sits 2.0 m from the pivot of see-saw. Jill has a weight of 450 N and sits 1.5 m from pivot. Who will move down?

• Jack

• Jill

• Both of them

• None of them

What is the anticlockwise moment acting on this crane?

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

Assuming the system is in equilibrium, calculate the missing distance d

• 3.4 m

• 2.8 m

• 4.4 m

• 1.6 m