Problem Analysis:
The image provided appears to be a micrometer measurement tool, commonly used for precise measurements. The task likely involves reading the measurement from the micrometer scale.
#### Key Components of the Micrometer:
1.
Main Scale (Fixed Scale): This is the larger scale on the left side of the micrometer. It typically has markings in millimeters or fractions of an inch.
2.
Thimble Scale (Rotating Scale): This is the smaller, rotating scale on the right side of the micrometer. It provides finer measurements, usually in fractions of a millimeter or thousandths of an inch.
3.
Pitch Line: The line that aligns with the main scale indicates the position of the thimble scale.
Step-by-Step Solution:
#### 1. Identify the Main Scale Reading:
- The main scale is the larger scale on the left.
- In this image, the pitch line (the horizontal line on the thimble scale) aligns with the
15 mm mark on the main scale.
- Therefore, the main scale reading is
15 mm.
#### 2. Identify the Thimble Scale Reading:
- The thimble scale is the smaller, rotating scale on the right.
- Each division on the thimble scale represents a fraction of a millimeter. In most micrometers, each division on the thimble scale represents
0.01 mm.
- Count the number of divisions on the thimble scale that are aligned with the pitch line.
- In this image, the pitch line aligns with the
7th division on the thimble scale.
- Therefore, the thimble scale reading is
7 × 0.01 mm = 0.07 mm.
#### 3. Combine the Readings:
- The total measurement is the sum of the main scale reading and the thimble scale reading.
- Main scale reading:
15 mm
- Thimble scale reading:
0.07 mm
- Total measurement: \( 15 + 0.07 = 15.07 \) mm
Final Answer:
\[
\boxed{15.07}
\]
Explanation:
The micrometer works by combining a coarse measurement from the main scale with a fine measurement from the thimble scale. By carefully aligning the pitch line with the scales, we can achieve high precision in the measurement. In this case, the object being measured has a diameter of
15.07 mm.
Parent Tip: Review the logic above to help your child master the concept of micrometer reading worksheet.
