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# what does a scale measure

#### Posted on January 12th, 2021

YourWeighingBuddy.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. The scales are actually measuring the force that the internal spring pushes up on the object, i.e. It is the same as your example where the additional force is the force required to accelerate the person in the elevator. The scales actually measure the force, which, if you remember your science class in high school, is measured in Newtons. The Conners rating scale assesses a range of behaviours. Sir if my weight is 52kg shown on digital scale then what would be my mass. What Does a Scale Measure? the normal force. The internal mechanism inside the scale measures force. If the scale reads in kg, how do you convert it to Newtons if the kg reading is not mass. Even when you have different weights on Earth and moon, or on any other planet, the mass of your body remains the same. Therefore the mass has a direct influence on the weight. Use the reading and units on the scale to determine what you have measured. The most widely used is the Likert scale (1932). To help you differentiate the two, here are the scientific definitions for both weight and mass. the person knows their attitude is being studied). That was a very useful Information. The weight force is due to the attraction between the object and the earth and so would not change (assuming fixed masses). More people when using scale confuse that mass and weight are the same things. A Likert scale enables respondents to choose from a linear set of responses that increase or decrease in intensity or strength. This attractive force is the weight of the object on Earth. Different kinds of kitchen scales will range in their capacity, precision, display, size, platform, and units of measurement. Yes that is correct. If you are measuring something very, very large, you'll need something with a large capacity. Learn how your comment data is processed. Learn how your comment data is processed. eval(ez_write_tag([[250,250],'yourweighingbuddy_com-large-leaderboard-2','ezslot_4',127,'0','0']));As mentioned above, the measuring unit for weight or force is Newton. BUT the trick here is, the scale's dial or the counter is calibrated in such a way that it shows only the mass, thus showing your mass in kg. On other planets with less gravity, an object will weigh less but its mass does not change. … Ask Question Asked 7 years, 5 months ago. However, here is the problem. It measures the force created by your mass being attracted to Earth. Very well explained. So, if I stand on a normally used scale that shows reading is 70 kg… Is it the reading of my mass? See my video on Hooke’s law to see this in action. I don’t know how to make a good experiment out of this. Hi Professor, The force is not normally displayed on a scale label and instead the conversion of the force to mass is shown. Notify me of follow-up comments by email. So do we get a value that is divided by acceleration due to gravity or we get a value on the scale that includes the value of g. Hi Meriam, The scale is calibrated, which means that a force is applied to it and then the scale is created to provide this reading in kg to give a mass reading. then what is my weight? Also, if i get rid of my mass, will i float? How does it measure force? The scale factor is commonly expressed as 1:n or 1/n, where n is the factor. If i weighing machine shows 50kg then it is my mass?? Hi Steve thanks for your comment. So, how does it do it? It just measures the force, which is our weight. On the decibel scale, the quietest audible sound (perceived near total silence) is 0 dB. It is a close-ended, forced-choice scale. Generally, a scale will measure the normal force it supplies to the object resting on it. I think this is slightly misleading. Hi Sir, No, it doesn’t. A balance scale measures relative weight, weight relative to another object rather than definite weight. But a normal scale in Kgs measures Mass. Does our scale show us Newtons? In the special case where the scale is stationary (as it appears in your picture), this is equal to $mg$, or the weight of the object. Yes you are right. The principle is to place a second scale next to the … | Physics Forums - The Fusion of Science and Community, http://www.learnwithmac.com/2015/03/27/what-do-scales-measure/, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Did you know: A logarithmic scale is used when there is a large range of quantities. I have a mass, so do i produce gravity? Various kinds of rating scales have been developed to measure attitudes directly (i.e. What does a 1:20 scale mean. This site uses Akismet to reduce spam. You should find that when you removed 50% of the mass that the weight reduced by 50%. One common method of measuring mass is to tare the scale and measure the mass directly. & Weighing machine measures mass only not a weight? imeasures an interactive, influencing disposition using adjectives such as sociable, lively, and talkative. What force does bathroom scale measure? On the other hand, the measuring unit of mass is kilograms or pounds (lbs), which is the unit our scale shows us. Well there is an easy way to confirm this. Normally it would show your mass in kg. Yes you produce an attractive gravitational force between you and other objects since you have mass. Best way to understand ! Isn’t the answer to the question, “What does a scale measure?” quite obvious? Inside a mechanical scale is a spring. Then should I confidently say that my mass is 90 Kg weighed on weighing machine? A nominal scale measurement normally deals only with non-numeric (quantitative) variables or where numbers have no value. Health is about more than weight, which is why modern smart scales do more than weigh you. But it has calculated this from measuring your weight. D) Mass . What do you think would happen if you measured three coins? Powered by - Designed with the Hueman theme. It simply converts the readings from the force we exert into the measuring units of mass for our understanding. The zero point on the Centigrade scale of measurement is arbitrarily set (freezing point of water) and does not mean there is “no temperature”. Weight is actually the pull of the gravity on our body or any other object. However, they are not. The answer is, force or weight, but what we read on the scale is the measurement of our mass. Today my teacher told that my mass is only 7kg, is it true? Thank u very much. Bio-electrical Impedance Analysis (BIA), or body impedance, sends a weak electric current through your body to estimate your body composition. The printed label on the scale display has been calibrated to convert this into a reading of mass. The scale is now rarely used by professional meteorologists, having been largely replaced by more objective methods of determining wind speeds—such as using anemometers, tracking wind echoes with Doppler radar, and monitoring the deflection of rising weather … However, the scale measures something different, which is actually force. You can also see it as our scale reflects the measurement of our mass, but in reality, it is actually measuring force or in simple words, weight. CWatters, Jul 22, 2016 at 2:32 PM […], Your email address will not be published. These springs actually measure the force that you exert on them when you stand on the scale. While these scales can’t yet tell you if those jeans make … Please check what the unit kg measures. See my video on gravitation here. A kitchen scale allows you to measure dry, liquid, or chopped ingredients in weight, rather than volume, for very accurate recipes. Hi Max. So, it certainly does not tell us about weight. This means that our scale measures mass even when it uses the mechanism that calculates the force you exert, but later convert it into kilograms. This means your weight may vary depending on the place you are using the scale, but your mass doesn’t. The greater the amount you shorten the spring, the more the force that is required. Hi Gayu. Spring scales can be used to measure weight in a wide range, depending on the stiffness of the particular spring. Scales measure the weight of material placed on the scale due to gravity producing a force on the mass of the material. This can be a bit confusing, but it's acceptable because (as explained above) weight and mass are connected in … This is called your weight. So by measuring the change in length of the spring, you have an indication of the force applied.In the scale, this change in spring length is used to move a dial which indic… In digital scales, the modern technology is used to convert the difference in the size of the springs into the weight displayed on the screen. However, if you use the same scale on Jupiter, your weight will increase to 165 kg due to higher gravity on Jupiter. Thanks. This means your weight will also change. However, you cannot use the same scale on any other planet to measure your mass, as you have to adjust the conversion of Newtons into kilograms according to the gravity of each planet. Note that the scales would be measuring the force correctly. Hi Sasi. The confusion is that the weighing machine actually measures your weight, that is a force between you and Earth. A Richter magnitude is calculated based on the amplitude of the largest seismic wave recorded for the earthquake. So if a measurement taken from the drawing is 10mm, then at real world scale would be 1000mm when built. The scales actually measure the force, which, if you remember your science class in high school, is measured in Newtons. This site uses Akismet to reduce spam. eval(ez_write_tag([[336,280],'yourweighingbuddy_com-medrectangle-4','ezslot_5',122,'0','0']));The answer lies in the design of the scales we use. Hi Horia. It is based on orders of magnitude, rather than a standard linear scale, so each mark on the decibel scale is the previous mark multiplied by a value. The issue here is gravity changes for different planets, doesn’t it? What does the scale measure? When we are using a scale, we actually want to learn about the mass we have, and this is what the scale shows us when it reflects the result in kilograms or pounds. So you can use these facts to help you do the experiment. Richter scale (ML), quantitative measure of an earthquake ’s magnitude (size), devised in 1935 by American seismologists Charles F. Richter and Beno Gutenberg. The reading on the scale may have been calibrated so that it converts this force into mass. eval(ez_write_tag([[250,250],'yourweighingbuddy_com-banner-1','ezslot_9',126,'0','0']));eval(ez_write_tag([[250,250],'yourweighingbuddy_com-banner-1','ezslot_10',126,'0','1']));Even though mass and weight are different, they are also linked with each other. measures our weight in kilograms, grams, or pounds. If say my daughter is 20KG and standing on another separate scale, and when she tried to pull me up, where my scale reading is reduced by say 9.8N(1KG), in my scale it would be 79KG and in her scale, it would be 21 KG ? You can learn more in my video on gravity. Here is another difference. Thank you for the explanation. When the size changes, the dial moves as well and tells you about the actual weight you have. As the person applies more force, the scale will respond by measuring the total normal force. The scale is measuring the force between you and Earth. For example, this is how people weigh themselves. So, what does a scale measure, really? Don’t we have an apples and oranges situation here units-wise? On Earth if you have a mass of 98kg your weight is 98 x 9.81 Newtons. So, how does it do it? The interval scale is the third level of measurement and encompasses both nominal and ordinal scales. The answer is not as obvious as you initially thought, right? When you weigh yourself on scales the display is actually showing your mass in kg even though it is measuring your weight. The force is your weight. Required fields are marked *. If you have no mass you would have no force between you and Earth so in theory you would float if you were above the ground. Please tell. A balance scale measures weight, but not in pounds or ounces, it measures in grams. You will then have your answer. Hi Sagar, yes if the weighing machine says your mass is 90 kg then that is your mass (assuming the weighing machine has been calibrated correctly). What is it -my mass or weight? Hi Felicity. So if I weigh 98 kg on Earth is my mass 98 kg or 98/9.8 = 10 kg? Dear Professor, Assuming your daughter is not on the scales when she applies an upward force to you, she reduces the downward force on the scale, and therefore the scale reading will reduce (to less than 80kg). The way they measure force is through the fact that if you shorten the length of a spring, a force is required. But this is not true. The earthquake’s magnitude is determined using the logarithm of the amplitude (height) of the largest seismic wave calibrated to a scale by a seismograph. The scale first measures the downward force and then convert it into kilograms or pounds. Viewed 10k times 0 $\begingroup$ When you stand on a bathroom scale, I know that the force displayed is the normal force. 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