# You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg ?

No, my mass is neither more nor less it remains equal to 42 kg because Mass is constant for all places..

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questtion is  wrong.

you have told the mass and you are asking about the mass.

we get our weight on weighing machine not our mass.

now if weight = 42 kg our mass would be less (because weight = mass * gravity)

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This question is correct but it is the way we are interpreting the question that is wrong . W = mg . If g is constant then the weight is equivalent to the mass of the body . w = m  . So when we are standing on the wheighing scale the reading is 42kgf ( wheight of the body ) . Wheight is the gravitational force acting on the object in the downward direction . According to the rule of bouyancy ,  all fluids apply an upthrust  force in the upward direction.  So the whieght shown on the weighing scale would be less than 42 kg .Thus we can say that our actual wheight / mass will be slightly more .

• 18

I think my answer is wrong , i am not sure  . I hope an expert can help us .

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I think that weight will be less than 42 kg.....
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But I m not sure.. Pls tell me d ans. If any1 nos.
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I guess ... Experts also don't know the answer to this question or else answer it please for the God's Sake! We are all eager to know the answer to this question then what is your problem?
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Mass is equal to weight when the body is in rest . So as the object does not have legs and cannot move on its own, it is in rest . Therefore, mass is exactly 42kg neither more nor less . PLEASE LIKE IT . PLEASE PLEASE PLEASE
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As we know that the mass of an object is constant throughout the universe, if the object is at rest or moving with an ordinary speed.

So if its mass is 42kg when it is weighed its mass is exactly 42 kg neither more nor less than that.
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See it is writtten MASS so we should blindly write that the mass will be EQUAL as we know mass is CONSTANT
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A weighing machine measures the weight of a body and iscalibrated to indicate mass. When we stand on a weighing machine, our weight acts downwards while upthrust due to air acts upwards. As a result, our apparent weight becomes less than the true weight. The weighing machine measures this apparent weight and hence the mass indicated by it is less than the actual mass. Our actual mass will be more than 42 kg.
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Mass of the body shown on weighing machine is less than our actual weight. Gases like air exert upthrust or buoyant force on our body. So the weighing machine which reads our weight, shows the weight which is less than the actual. So our actual weight will be more than 42 kg. Hope it helps !!
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A weighing machine is a sort of spring balance which measure the weight (and not the mass) of a body. When we stand on the weighing machine, our weight (which is due to gravitational attraction of the earth) acts vertically downwards. But the buoyancy due to air on our body acts vertically upwards. As a result of this, our apparent weight (true weight buoyant force) is less than the true weight Since the weighing machine measures the apparent weight, our true weight is more, i.e., more than 42 kg.
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I don't think air bring changes in our weight.
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In fact, a weighing machine is a sort of spring balance which measure the weight (and not the mass) of a body. When we stand on the weighing machine, our weight (which is due to gravitational attraction of the earth) acts vertically downwards. But the buoyancy due to air on our body acts vertically upwards. As a result of this, our apparent weight (true weight buoyant force) is less than the true weight Since the weighing machine measures the apparent weight, our true weight is more, i.e., more than 42 kg.
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Ur mass is 42kg Mass will be always the same everywhere. Only weight changes according to the gravitational force. So the mass will not be more or less than 42kg
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What are you looking for?