how do we use a ruler correctly in physics
Answers
Recognizing the Different Types of Rulers
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Understand what a ruler is. A ruler is a measuring stick marked with units for measuring along its edge. [1]
These can be made of plastic, cardboard, metal, or fabric. marked units for measuring length along its edge.
These can be for either English (inches) or metric (millimeters or centimeters) units of measurement.
In the U.S. and the UK, a student's rule is from 12 to 36 inches (30.48 to 91.44 cm), or from one to three feet long. Some typical fractions of inches used to make measurements more accurate are halves and quarters. Some typical fractions of centimeters are thin marks for every tenth of a centimeter (every one millimeter), and thick marks for every half centimeter (every five millimeters).
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Learn what a seamstress' tape is. This is a soft fabric tape, also marked with numbers representing inches or centimeters. [2]
This can be wrapped around a person's torso, to measure chest, waist, neck, and other sizes for sewing clothing.
It may be used for measuring length, such as inseams and sleeves of garments.
Using these to measure 3-dimensional objects that are curved is best.
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Know what a carpenters ruler is. These are about 6 feet (1.8288 meters) long in the U.S., and can be folded to fit into a tool pouch or pocket. [3] Carpenters rulers used internationally are usually 2 meters long.
These are also called "stick rules".
They are often scaled in both metric units (mm, cm and m) and foot and inch measures..
Typically, the inch segments are made up of 8 inches, and fractions are marked to 1/16 inch.
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Find a tape measure and look at it. Also called measuring tapes, these are flexible metal or fiberglass tapes. [4]
These have a spring to rewind them into a case.
They are also rolled on a spool in lengths of 100 meters (or 330 feet) and longer.
Most measuring tapes have one side for U.S. Customary and one side for metric units, or both on the same side.
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Know what an architect's scale is. These are not actual lengths of measurement but will give distances to scale from a size ratio. [5]
These are "scale" rulers, with special marks representing a size ratio.
For example "1 inch equals 1 foot" (1:12 ratio), "1 mm equals 1 cm" (1:10) or "1 cm equals 1 meter" (1:100).
These are used for drawing precisely scaled blueprints and building plans.
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Method 1 Quiz
Which type of ruler would work best to measure the circumference of a punching bag?
Seamstress’s tape
Stick rulers
Measuring tape
Architect’s scale
Method
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Reading a Standard Unit Ruler
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Learn how U.S. Customary units work. U.S. Customary units, sometimes called "Standard Units" in the U.S, are based on feet and inches. [6]
The inch is the basic unit in U.S. standard measurement.
There are 12 inches in a foot.
Most rulers are 12 inches long.
Longer rulers, which are 3 feet long (or 36 inches long, equal to one yard) are called yardsticks.
Most countries don't use this unit of measurement any longer, preferring the metric system.
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Answer:
A ruler can be defined as a tool or device used to measure length and draw straight lines.
A ruler or measuring tape can be used to measure lengths in both metric and customary units. Here, the ruler is marked in centimeters (cms) along the top and in inches along the bottom.
The marks or intervals on a ruler are called hash marks.
Measuring Objects using a Ruler:
To measure the length of an object, place the zero hash mark of the ruler exactly along one end of the object. Align the object you are measuring along the edge of the ruler. Note the hashmark on the ruler along which the other side of the object ends.
Here, the shoelace is 17.6cms long in metric units of length, and 7 inches long in customary units of length.
Reading a Ruler:
Reading Centimeters and Millimeters: A centimeter is smaller than an inch. The long hash marks under which numbers are written on the ruler denote centimeters.
A millimeter is even smaller than a centimeter. The smaller hash marks between each centimeter represent millimeters.
10-millimeter hash marks make 1 centimeter.
Reading Inches: An inch is bigger than a centimeter. The big long hash marks above which numbers are written on the opposite side of the centimeter ruler denote inches.
Explanation:
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