Fisika Kelas X || Jangka Sorong || Aktivitas 1.3 A || Kurikulum Merdeka

Summary

This video tutorial introduces the use of a caliper, explaining its components and how to perform accurate measurements. Key topics include the different scales on the caliper (main scale, nonius scale), how to calculate the smallest scale value (NST), and the method for measuring internal and external dimensions, thickness, and depth of objects. The tutorial also covers how to measure uncertainty and calculate measurement results, ensuring precise readings. Detailed step-by-step instructions are provided to help students understand how to properly use a caliper in practical scenarios.

Takeaways

• 😀 The lesson introduces the purpose and components of a vernier caliper, emphasizing its various parts like the upper and lower jaws, depth gauge, main scale, and vernier scale.
• 😀 The least count (smallest scale value) of a vernier caliper is explained, with examples showing how it varies based on the number of lines on the vernier scale: 0.1 mm, 0.05 mm, and 0.02 mm.
• 😀 Students are taught to calculate measurement uncertainty using the formula: uncertainty = 1/2 of the smallest scale value, specifically the vernier scale's least count.
• 😀 The general steps for using a vernier caliper are: open the jaws, lock the measurement, set the zero point, read the main scale, and check where the vernier scale lines up for more precise readings.
• 😀 Different measuring applications are demonstrated, including measuring the internal diameter with the upper jaw, the external diameter with the lower jaw, thickness, and depth using the depth gauge.
• 😀 The importance of locking the caliper after taking measurements to prevent shifting and ensuring accurate results is emphasized.
• 😀 The video shows how to read the final measurement by combining the main scale and vernier scale readings, with an example measurement of 1.16 cm ± 0.01 cm.
• 😀 The script explains how to calculate the least count and uncertainty for different types of vernier calipers, helping students understand variations in precision.
• 😀 The script includes an example of measuring an object, such as a tube, demonstrating how to adjust the caliper, lock it, and take a correct reading.
• 😀 The lesson encourages students to review the content, ask questions, and practice measuring with the caliper to solidify their understanding.

Q & A

What are the main components of a vernier caliper as shown in the script?

The main components of a vernier caliper are the lower jaw, upper jaw, depth gauge, main scale with cm unit, main scale with inch unit, nonius scale with mm unit, nonius scale with inch unit, and the lock mechanism.

How do you calculate the smallest scale value (NST) of a vernier caliper?

To calculate the smallest scale value (NST), divide the length between 0 and 10 marks of the nonius scale by the number of divisions on that scale. For example, if there are 10 divisions, each line is worth 0.1 mm; for 20 divisions, it is 0.05 mm; and for 50 divisions, it is 0.02 mm.

What formula is used to calculate the uncertainty (delta X) in measurements using a vernier caliper?

The general formula to calculate uncertainty is delta X = 1/2 * smallest scale value. For vernier calipers with a nonius scale, the uncertainty is equal to the smallest nonius scale value.

How do you perform a measurement using the lower jaw of a vernier caliper?

To measure with the lower jaw, open the caliper and place it around the object. Slide the jaw until the caliper is locked in place, and then read the measurement.

What is the purpose of the upper jaw of the vernier caliper?

The upper jaw is used to measure the internal diameter or inner dimension of an object.

How do you measure the thickness of an object using a vernier caliper?

To measure thickness, slide the caliper until it fits snugly around the object, then lock it in place and read the result.

What does the depth gauge of a vernier caliper measure?

The depth gauge is used to measure the depth of an object, such as the inside depth of a hole or tube.

How do you measure the internal diameter of a tube using the vernier caliper?

To measure the internal diameter, open the upper jaw of the caliper and place it inside the tube, then slide it until the jaws meet the inner walls, lock it, and read the result.

How is the final measurement calculated when using the main scale and the nonius scale?

To calculate the final measurement, add the reading from the main scale to the value obtained from the nonius scale (multiplied by the smallest scale value of the nonius). For example, if the main scale reads 1.10 cm and the nonius scale reads 6 (multiplied by 0.01), the final measurement is 1.16 cm.

What should be done to ensure an accurate measurement when using a vernier caliper?

To ensure accurate measurement, make sure to properly close the jaws around the object, lock the caliper to prevent sliding, and read both the main scale and nonius scale carefully.