English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

A ball weighs 1.62oz or 45.93139g or .459kg

How many and how would I transform this into Newtons?

Ultimately, I want to find out how much mass this object would have on Earth.

g=9.81m/s^2

2007-02-10 07:25:26 · 6 answers · asked by travo 1 in Science & Mathematics Physics

6 answers

Mass is an unchanging quantity of an object. Its mass on Earth will be the same as its mass on the Moon, which will be the same as its mass anywhere else in the universe.
The SI unit of mass is the kilogram (kg).

Weight is a force and is dependent on the gravitational acceleration experienced by the object.
The SI unit of weight is the same as the unit of force, it is the Newton (N).

Weight = mass * gravity

We are told that the mass of the ball is .459 kg.
To find its weight, we multiply this quantity by the gravitational acceleration on Earth,
Weight = (.459 kg) * (9.81 m/s^2)
Weight = 4.50 Newtons

So on Earth, the object with mass .459 kg would weight 4.50 Newtons.


EDIT:
Upon checking the unit conversions you did, I see that you forgot a zero when typing the kg quantity.
1.62 ounces = 0.0459 kg, not 0.459 kg.
'
So, repeating the calculations I did above and taking the corect kg value into account,
Weight = (.0459 kg) * (9.81 m/s^2)
Weight = 0.450 Newtons

http://www.digitaldutch.com/unitconverter/

2007-02-10 07:31:39 · answer #1 · answered by mrjeffy321 7 · 1 1

Everbody else's answer so far is WRONG....If you want the right answer please read...........

Well first of, you are incorrect in saying that you know the weight.
Weight is a force which includes gravity's acceleration.
W=mg = Force
What you have is the mass, not the force - don't confuse the two. Your mass will not ever change, your weight will change though if you were to go to the moon for example. To get the weight just multiply the mass times gravity which is 32.2 ft/s^2 in U.S. units or 9.81 m/s^2 in SI units.
and 1.62 oz is NOT .459 kg There are 16 oz in a pound you are saying that it is about 1 pound by using 1 kg. Oz is a measure of mass so it would be 1.62/16 = 0.10125 lbm ...(lbm(pound mass))
now convert this to kg --> divide by 2.2
0.10125/2.2 = 0.0460 kg now multiply by 9.81 which is the gravitational constant:
F=(0.0469kg*9.81m/s^2)= 0.451 Newtons is the correct answer not 4.51 N like everyone else said because you said 45.9 g = 0.459 kg it equals 0.0459 kg

Hope that helps.

2007-02-10 16:03:23 · answer #2 · answered by C_Rock136 3 · 0 1

W=mg=>W=0.459kg*9.81m/s^2=4.50 Newtons

I think you mean you want to find out how much this object would WEIGHT on Earth (mass would be the same everywhere). Weight is related to mass by the equation above (W=mg) which is the case of Newton's second law of mottion (F=ma) inside the gravitational field of the Earth.

2007-02-10 15:27:45 · answer #3 · answered by Amelia 2 · 0 1

The mass is .459kg, because kg is a measure of mass, not weight, and mass is the same everywhere, not just on Earth.

It is technically incorrect to say the ball weighs .459kg. It masses .459kg and weighs .459*9.81=4.50279N.

The confusing thing is that pounds (and ounces) are units of weight, not mass, and kilograms (and grams) are units of mass, not weight. In the imperial system, mass is measured in slugs and in the SI system weight is measured in Newtons. Unfortunately most people incorrectly call a weight of 8.91 Newtons a one kilogram weight, which causes endless confusion to people trying to do physics problems.

2007-02-10 15:29:05 · answer #4 · answered by campbelp2002 7 · 0 1

weight never changes where ever u go but mass depend on gravity.weight multiplied by gravity get mass.

2007-02-10 15:36:33 · answer #5 · answered by Anonymous · 0 2

W = mG

So that would mean that Work = .459 kg x 9. 81 m/s^2

Work = 4.50 N

Good luck with any of your other problems! ;-)

2007-02-10 15:34:42 · answer #6 · answered by lildevilgurl152004 7 · 0 2

fedest.com, questions and answers