A traditional pair of scales uses sliding masses of 10 g and 100 g to achieve a balance. A diagram of the arrangement is shown in Figure 4.23. The bar itself is supported with its centre of gravity at the pivot.

a. Calculate the value of the mass M, attached at X.
b. State one advantage of this method of measuring mass.
c. Determine the upwards force of the pivot on the bar.

Transcribed Image Text:

X 20 cm pivot 100 g 10 g M 30 cm 45 cm Figure 4.23: For Question 8.