Moment of force

What mass now balances the bags?

• 3.5 kg

• 7.0 kg

• 12 kg

• 14 kg

Which statement is correct?

• All the forces are equal in size.

• The resultant force on the beam is in the opposite direction to the resultant turning effect.

• The resultant force on the beam is zero and the resultant turning effect on the beam is zero.

• The total upward force is twice the total downward force.

Which diagram shows the rod in equilibrium?

• A

• B

• C

• D

Which beams rotate clockwise?

• P and Q only

• P and R only

• Q and R only

• P, Q and R

What is the weight of the beam?

• 2.0 N

• 3.0 N

• 3.3 N

• 5.0 N

In the diagram, W is the weight of the plank, acting at its mid-point. What is the value of W?

• 47 N

• 100 N

• 133 N

• 350 N

Which cone is the most stable?

• A

• B

• C

• D

What is the size of force F needed just to lift the loaded wheelbarrow?

• 350 N

• 430 N

• 600 N

• 840 N

What is the size of U?

• 0.5 N

• 1.5 N

• 2.5 N

• 6.0 N

Which chair is the least stable if the child moves?

• A

• B

• C

• D