When we say 2Kg Rice, is it 2Kg mass or 2Kg weight?.?

Question

In the above question If '2Kg' is the weight and not '2Kg' mass, how is that it is said 'so many' Kgs is the mass of earth, why not it is 'so many' Kgs is the weight of earth?

Answer 1

A kilogram is a measure of mass. Weight is a force, measured in newtons. Humans often say "weight" when they mean mass, because "I weigh 70 kg" is easier to say (even though it's technically wrong) than "I have a mass of 70 kg" or "I weigh approximately 700N at sea level on this planet". Mass is constant, whereas your weight would change if you - say - went to the Moon, or into deep space. You'd have less weight but you'd still have the same mass.

Answer 2

Weight means a mass causing a force by gravitation, according to F=m*a. a is 9.8 m/s^2 on the surface of the earth, but can have any other value on the moon or other places. It's even zero in space far away from any planet or sun. In that case you would say something is weightless.

The mass is a property of the thing, which does not depend on gravity or something else, so 2 kg rice will we 2 kg rice wherever you measure it: You don't "lose" mass just by transporting it on the moon, although the lower gravity there will make it easier to lift it.

Answer 3

Kilograms are technically a unit of mass, not weight, but as mass and weight are at a fixed ratio unless gravity changes, it's usually of no practical purpose to distinguish the two.

When you're talking about the Earth, "weight" is kind of meaningless because weight is the force imparted by a mass upon what it rests due to gravity. Since the Earth's not resting on anything, it doesn't really have weight in that sense.

If you actually want the SI unit of weight, it's the newton (N) (weight is the same as force), which is 1 kg*m/s^2, so to convert mass to weight, multiply by 9.8 (Earth's gravity at sea level is 9.8 m/s^2)... a 2 kilogram mass under normal conditions weighs 19.6 newtons.

As a footnote, the imperial unit pound (~0.45 kg, for practical purposes) is actually a unit of weight/force. The imperial mass unit is called a "slug," and is rarely used.

Answer 4

When we say 2kg rice we talk about the mass of the rice & not its weight If u want 2 clear up ur concept go 4 "Ranajit Das" physics book (old syllabus)

Answer 5

2kg is the mass of the rice
when we consider weight it is expressed in kg-newton
and u should know that so many is also the mass of the earth

Answer 6

kg is used for measuring the mass of an object .It can be measured easily by using a beam balance 2 pans in this case, both the pans are attracted by gravity so its effect is nullified. Weight is actually a force, measured in Newtons it can be measured using a spring balance.. mass is independent of gravity while weight is not. So your weight is different on earth , on Jupiter ,on the moon and in space while your mass is constant throughout. this also means that a beam balance will give u the same reading everywhere while the reading on the spring balance can vary with variation in gravitational force.

Answer 7

kg is the unit for mass,so 2 kg rice mean 2kg mass rice

Answer 8

Kilograms is a measure of mass. Weight is the force of gravity on mass. On the earth mass can be used in place of weight because the variations in gravity are generally negligible.

Answer 9

the unit for mass is kg, thus 2kg of rice refers to the mass. the unit for weight is kN. basically, (weight) w = m (mass) x g (gravity)....

Answer 10

in the initiating.. in basic terms because you've stopped dropping weight does no longer advise that your body is at that's acceptable weight. although there will be some reality to that, it may't be the case. our bodies are nicely tuned machines and after we commence a sparkling 'undemanding' we get instantaneous effects, yet quickly our bodies get used to it, and hence it does which have an similar quick effects. Your thoughts are to proceed with what you've been doing, you receives effects see you later as you're burning more desirable than you're setting up. or you ought to attempt replacing your undemanding quite, i'm no longer positive what you're doing, yet you ought to upload some weight practise ( it truly is superb on your bones, and the further muscluar you're the further fats you burn immediately).. or you ought to attempt replacing your cardio undemanding, once you've been doing secure state kind routines, attempt doing period practise, upload an incline and so on.. this gained't purely project your body yet will keep your techniques interested to boot. Dont get discouraged by technique of what the dimensions says.. once you've been practise with weights that would also clarify why you have not "misplaced" any weight.. you could nicely be dropping fats, yet gaining muscle.. it truly is an outstanding component.. attempt to base the way you sense extra on how your clothing in positive condition and how you sense.. do you sense fit? extra lively?? solid :) keep up the solid artwork... dont get discouraged.. you're doing all of your body solid.. ignore that nasty scale !!!