levers and moments L.C Physics

The place where a lever pivots is called the _______.

• Pivot point
• Tissue
• Fulcrum

It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?

• 200 J
• 20J
• 100 J
• 10 J

The units for work are

• netwons
• joules
• meters
• seconds

What is the anticlockwise moment acting on this crane?

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

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

• TRUE
• FALSE

What is the moment acting on the seesaw?

• 1.6Nm
• 15Nm
• 16N
• 4Nm

why is the car on the left unstable?

• Its centre of mass is high
• it has a narrow base
• it has a high height
• all of the above

What is the centre of gravity ?

• it is a single point at which the object can balance.

• The mass is distributed equally around it.

• the centre of gravity of the object

• All of the above

What is the moment of the 10 N force about point A (M_A)?

• 10 N·m
• 30 N·m
• 13 N·m
• (10/3) N·m 

Moment is bigger if the force acts further  from turning point

• TRUE
• FALSE