The spanner shown in the diagram is used to turn a nut - Leaving Cert Physics - Question b - 2013

To calculate the moment (or torque) applied by the spanner to the nut, we can use the formula:

$$M = F imes d$$

Where:

• $M$ is the moment,
• $F$ is the force applied, and
• $d$ is the distance from the pivot point to the line of action of the force.

Given that:

• $F = 50 \, \text{N}$
• $d = 0.10 \, \text{m}$,

we can substitute these values into the equation:

$$M = 50 \, \text{N} \times 0.10 \, \text{m} = 5 \, \text{N m}$$

Thus, the moment of the force applied by the spanner to the nut is 5 N m.