moments at work

Question 1

What is the weight of the object called?

Answer 1

The load

Question 2

What is the force that the person applies called?

Answer 2

The effort

Question 3

What is the point about which the lever turns?

Answer 3

The pivot or fulcrum

Question 4

How can using a crowbar help with lifting heavy objects?

Answer 4

The effort needed to lift the same object is only a small fraction of its weight

Question 5

What is using a lever to move a much bigger load an example of?

Answer 5

A force multiplier

Question 6

What is the line of action?

Answer 6

The line along which a force acts

Question 7

What is the equation for working out the moment?

Answer 7

moment (Nm) = force (m) x perpendicular distance from the line of action of the force to the pivot (m)

Question 8

What is the unit for a moment?

Answer 8

Nm

Question 9

How can a person increase the turning effect of the force (moment) using the example of a spanner?

Answer 9

• increasing the size of the force

* using a spanner with a longer handle