G8_Physics_8.12_Calculating Moments

Moment

• force ÷ distance

• distance ÷ force

• force x distance

• non of all

Force is measured in

• newtons (N)

• metres (m)

• newtonmetres (Nm)

• non of all

Distance is measured in

• newtons (N)

• metres (m)

• newtonmetres (Nm)

• non of all

Moment is measured in

• newtons (N)

• metres (m)

• newtonmetres (Nm)

• non of all

 A boy uses a force of 5 N to close a large door.

 The handle is 1.5 m from the hinge

 (the pivot).

 What is the moment of the force?

• 0.5 Nm

• 5.5 Nm

• 7.5 Nm

• 10.5 Nm

 Sunita weights 400 N.

 She sits 1.5 m from the pivot of a see-saw with her mother 1.0 m from the pivot on the other side.

 Her mother weighs 600 N.

 Is the see-saw balanced?

• yes

• No

 Davina is balancing some 10 N weights

 on a see-saw. Is it balanced?

• yes

• no

Find the Force

• Force = 6N

• Force = 10N

• Force = 16N

• Force = 20N

Find the Distance

• 0.45 m

• 45 m

• 450 m

• 4500 m

 On a see-saw, a  …………………………… force acting a short distance from the pivot will

 be balanced by a  ……………………….. force acting a long distance from the pivot.

• small / big

• big / small

• small / small

• big / big