Problems: Turning Effect

Question 1

A mechanic applies a force of 200 N at the end of a spanner of length 20 cm. What moment is applied to the nut?

Question 2

A crane driver has a chart in his cab which tells him how far he can safely extend the jib of his crane.

Size of load (tonnes) Maximum length of jib (m) Moment (load×length
10 12
20 6
30 4
40 2

a) Copy and complete the table.

b) What do you notice and why is this?

c) What length of jib could he have with a load of 24 tonnes?