When I weigh myself on a scale, it tells me for example I'm 75 kg. The Kilogram is a unit for mass. However, we know that the scale reads the weight (whose unit would be Newton). Do I weigh 75x10=750 Newton? or 75 Newton?
2007-04-12 19:29:55 · 6 answers · asked by Young Guy 2 in Science & Mathematics ➔ Physics
It is actually your mass (kg) times gravity (m/s^2) which, in your case, is 75kg x 9.8m/s^2 = 735N
2007-04-12 19:36:30 · answer #1 · answered by Russel Teek 1 · 0⤊ 0⤋
A scale measures weight. The scale will read a lower value if taken to high altitudes where g is less, or a higher value it is near a high-density area which increases g, even if the mass on it is the same. When you step on a scale, the scale actually indicates newtons, but the markings on the scale say "kilograms". This is an unfortunate situation since the same unit is used for mass. To be correct, the scale should read kilogramwt (kgwt) which is the same as a newton, and distinguishes the mass unit from the weight unit. In any case, if you weigh something on a scale and it reads n kg, that thing has a mass of n kg, and weighs one newton.
A balance, however, can indicate true mass and its reading is independent of g.
2007-04-13 03:13:15 · answer #2 · answered by gp4rts 7 · 0⤊ 0⤋
A scale is calibrated for to measure kg weight in practical.But in scientific measurement needs the unit of force in Newton.1 kg = m g = 9.81 Newton-force
...75kg -wt=750 N
2007-04-13 10:22:45 · answer #3 · answered by Tuncay U 6 · 0⤊ 0⤋
Mass and weight are two different quantities. SI unit of mass is kgs and SI unit of weight is newtons.
1Newton = 1kg x 9.8m/s^2
weight= mg
your mass is 75 kg
which implies your weight is 75 x 9.8 = 735 N
2007-04-13 02:37:30 · answer #4 · answered by Anonymous · 0⤊ 0⤋
nope...kilogram is a unit to measure weight, not mass.
What weighs more: 1 kilogram of cotton? or one kilgram of lead?
As you see its a trick question, one kilogram is a measure of weight not mass. One kiligram is the mass weight of 1 liter of water at 22 centigrades at sea level (1000 milliliters)
You are probably mistaken with the Newtonian units, since atoms and elements, molecules etc, the molecular and atomic weight are measured taking the Hydrogen as a unit (Daltonian weight) meaning that an element or molecule weighs N daltons = N times the weight of the atom of Hdrogen (hydrogen = l dalton)
2007-04-13 02:37:27 · answer #5 · answered by Sehr_Klug 50 6 · 0⤊ 0⤋
You weigh 750 kgms*-1.
2007-04-13 02:44:50 · answer #6 · answered by Master Anarchy 2 · 0⤊ 0⤋