Membuat Alat Klinometer dan Penggunaan Alat Peraga Klinometer

Summary

This video demonstrates the use of a clinometer in learning trigonometry. The process includes creating the clinometer using materials like a protractor, thread, cardboard, and weight. It explains the steps to assemble and use the device, such as measuring angles to observe the height of a tall object, like a tree. The script details how to calculate elevation angles and determine the height of an object using trigonometric principles, like the tangent function. The example shows how the distance and angle help to estimate the height of a tree, providing both a practical and educational insight into applying trigonometry in real-world scenarios.

Takeaways

• 😀 A clinometer is a tool used in trigonometry lessons to measure the elevation angle of objects.
• 😀 Materials needed to create the clinometer include a protractor, glue, string, weight, straw, cardboard, scissors, and writing tools.
• 😀 The process starts by cutting cardboard into a pistol shape, attaching the protractor with a 0-degree point aligned with the handle, and adding a hanging string.
• 😀 A weight is attached to the string to ensure the clinometer's string hangs freely when held.
• 😀 The final step of making the clinometer involves gluing the protractor onto the cardboard and attaching a straw along the top edge to stabilize it.
• 😀 To use the clinometer, the observer stands at a distance from the object and observes the top of the object through the straw.
• 😀 The clinometer is adjusted so that the string stabilizes in place, and the angle of elevation is measured using the protractor.
• 😀 The height of the observed object can be calculated using trigonometric formulas, based on the distance and measured elevation angle.
• 😀 The example calculation shows that with a 625 cm distance and a 50° angle, the object’s height was calculated using the tangent function.
• 😀 The final height of the object is found by adding the height of the observer's eyes (143 cm) to the calculated height of the object (525 cm), resulting in a total of 668 cm.

Q & A

What materials are required to create a clinometer?

The materials needed to create a clinometer include a degree arc (protractor), glue, string, weights, a straw, cardboard, scissors, and writing tools.

What is the first step in constructing the clinometer?

The first step is to cut the cardboard into a shape resembling a pistol.

How do you attach the protractor to the cardboard?

The protractor is affixed to the cardboard in such a way that the 0-degree line is aligned with the handle of the cardboard, and the curved part of the protractor faces downward.

What role does the string play in the clinometer?

The string is inserted through the hole in the center of the protractor. It hangs freely when the protractor is held upright and helps to measure the angle of elevation based on its position.

How is the clinometer used to measure the height of an object?

To use the clinometer, the observer stands at a distance from the object and looks through the straw to see the top of the object. The angle of elevation is determined by measuring the angle between the string and the protractor.

What is the significance of the angle of elevation in this experiment?

The angle of elevation helps to calculate the height of the object. It is the angle formed between the protractor and the string, which can be used in trigonometric calculations to find the height of the observed object.

How is the angle of elevation calculated?

The angle of elevation is calculated by subtracting the measured angle from 90°. For example, if the angle is 50°, the elevation angle is 90° - 50° = 40°.

What trigonometric function is used to calculate the height of the object?

The tangent function (tan) is used to calculate the height of the object. The formula is tan(angle) = height (Y) / distance (X).

How do you find the height of the object using the clinometer?

To find the height of the object, multiply the tangent of the angle of elevation by the distance from the observer to the object. For example, tan(40°) = Y / 625, so Y = tan(40°) * 625 = 525 cm.

How is the total height of the object determined after calculating the elevation?

The total height of the object is determined by adding the height of the observer's eye level to the calculated height of the object. For example, 525 cm + 143 cm (observer's height) = 668 cm.