Question

1. using the picture of the calipers (above), give the measurement in millimetres to two decimal places. note: refer to example three.

Explanation:

Step1: Identify main - scale reading

The main - scale of the calipers shows a reading of 10 mm.

Step2: Identify vernier - scale reading

The vernier - scale has 20 divisions in 19 mm on the main - scale. Each vernier division is $\frac{19}{20}= 0.95$ mm. If the 10th vernier division aligns with a main - scale division, the vernier reading is $10\times(1 - 0.95)=0.50$ mm.

Step3: Calculate total reading

The total reading is the sum of the main - scale and vernier - scale readings. So, $10+0.50 = 10.50$ mm.

Answer:

10.50