Year 8: Moments

The turning effect of a force is called a

• moment

• momentum

• rotation

• pivot

The point at which a lever or see-saw

balances or rotates.

• Pivot

• Moment

• Momentum

• Centre

Where is the pivot on a crowbar?

• Point A

• Point B

Where is the pivot on the wheelbarrow shown?

• Point A

• Point B

The turning effect of force can make an object to turn in a ________________ and ___________ direction

• Clockwise and Anti-clockwise

• Up and Down

• Right and Left

What TWO things does the

size of a moment depend on?

• the force applied

• the distance from the pivot

• the length of the object

Moment (Nm) =

_______ (N) x __________(m)

• Force and perpendicular distance

• Energy and perpendicular distance

• Momentum and perpendicular distance

• Speed and time

What is moment measured in?

• Newton metres (Nm)

• Newtons (N)

• Kilograms (kg)

How could you increase the turning effect of a spanner?

Select TWO answers.

• hold the spanner closer to the pivot

• hold the spanner further away from the pivot

• use less force to turn the spanner

• use more force to turn the spanner

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A force of 5 N acts on a lever 2 m from the pivot. What is the size of the moment?

• 10 Nm

• 7 Nm

• 3 Nm

• 2.5 Nm