For example, for a rectangular picture frame, you know the center of mass is in the middle of the rectangle and you can find that with a ruler. Or if you hang an object, for example a picture frame from a nail, the center of mass will hang directly below the nail.įor symmetrical objects, finding the center of mass is relatively easy. The center of mass is the point about which an object will balance if you try to rest it on your fingertip. How do you define the exact center of an object? One way to do this is to find the object's center of mass. But how do you find the “middle” of an irregular shape such as a drawing of a dog or a cat? This project will show you how to do it using nothing but string and paper clips! I hope this has helped you to better understand how to read a tape measure.With a little time, you can probably find the center of simple shapes such as circles and squares pretty easily. (1/2"), four 1/16-inch increments to reach a quarter inch (1/4"), and two 1/16-inch increments to reach an eighth inch (1/8"). It takes sixteen 1/16-inch increments to total one inch, eight 1/16-inch increments to reach a half inch The 1/8-inch markings are further divided into short increments that mark the halfway point: 1/16-inch (see photo to the left). Eight 1/8-inch increments equal an inch, four 1/8-inch increments equal a half-inch (1/2"), and two 1/8-inch increments equal a quarter inch (1/4"). Mark refers to an eighth (1/8) of an inch (see photo to the left). To finish the scale between the 1/4-inch and 1-inch marks, there isĪnother short increment that’s the halfway point in a quarter. If you add four quarters (1/4") together, its sum will be one inch. To sum it up, if you add two quarters (1/4") together, it will equal half an inch (1/2"), and if you add two 1/2 inches, it will equal one inch. If the increments are marked on the scale, they should read 1/4-, 1/2-, 3/4-, and 1-inch. The next 1-inch increment, you have counted out the 4 quarters that make up an inch. If you count from 1 to the first 1/4-inch increment, to the 1/2-inch increment, to the next 1/4-inch increment (which is really 3/4 of an inch), to Increment which is the quarter mark, or 1/4 of an inch (see photo to the left). The halfway point between 1/2-inch and 1-inch is another short This mark is the halfway point of an inch and is referred to as 1/2-inch. In the image to the left between 1 and 2 there's a mark halfway between the two numbers that is half the size of the full length of the 1-inch increment. When you follow the numbers from low to high, these long hash marks are very visible, as you can see in the image above.īetween the numbers are other sized hash marks, all referring to measurements within a 1-inch scale. These marks run between the upper and lower scales and are the longest marks on the tape measure, which identifies them as inch marks. The numbers 1, 2, 3, etc., are clearly marked on the blade and have a hash mark on one side or the other of the number or in the middle of the number. You can confirm this by counting the 16 different-sized increments starting to the right of 1 up to and including the longest increment sitting next to 2. If the tape measure you are looking at has 16 increments to an inch, then it is in 1/16" increments. Within this scale of increments, the markings at different heights-starting from the shortest to where they meet each other between the upper and lower scale-all refer to measurements. Within these markings are different height increments that run the full length of the upper and lower scale and which mirror each other as clearly shown below. Tape measure blade marks are given in fractions, inches, and feet. How do I read the markings on a tape measure? Basically, I was expecting to purchase an extremely long flexible ruler, but the tape measures I've looked at go beyond that. I'm shopping for a tape measure but am confused by all the markings I see on the blades.
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