Levers

Which Greek philosopher first thought of levers?

• Archimedes

• Aristotle

• Plato

• Socrates

How do you balance a seesaw if your friend is heavier?

• Move away from the middle

• Move toward the middle

• Stand up

• Stay still

Which is the force YOU are applying while trying to lift a weight?

• Effort force

• Fulcrum

• Resistance/Load Force

• Thrust

If a seesaw balances depends on ...

• The size of the force

• The distance from the middle

• The size of the force multiplied by the distance from the middle

• Neither

Which of the following means the middle of the seesaw - the point where the seesaw tilts?

• Fulcrum

• Effort force

• Resistance force

• Moment

Increase the distance from the fulcrum and you need ...

• Less force

• More force

• The same force

• No force

If you are twice as massive as your friend on the seesaw, for the seesaw to balance, they need to sit ...

• Twice as far away

• Half as far away

• In the same position

• Four times as far away

What do we call a turning force around a fixed pivot

• Moment

• Thrust

• Force

• Time

If the moments on an object are equal and opposite, what happens?

• The object is balanced

• The object turns clockwise

• The object turns anticlockwise

• The object accelerates

Moment =

• Force x Distance from the pivot

• Force / Distance from the pivot

• Force + Distance from the pivot

• Force - Distance from the pivot