Physics: mass, weight, gravity?

Question

If an object weighs 100 Newtons on Earth, is the mass of the object is 100N/9.81m/s^2 = 7.17 kg. Correct?
Is the mass of the object on the moon the same?

So is the mass of an object the same no matter where it is in the universe?

sorry
100N/9.81m/s^2 = 10.19kg

Also, What is the relationship between the mass of an object and the acceleration due to gravity on earth? how would the graph look like??

Answer 1

Yes. The MASS M is the unchanging property; it is the same no matter where it is in the universe.

Technically, the WEIGHT of anything at any location is the local gravitational force acting on it. It is POSITION-DEPENDENT.

So the weight WE on Earth is WE = M*gE, where gE is the rate at which the mass would fall near Earth's surface, that is (nominally) gE = 9.81m.s^2.

The gravitational acceleration on the surface of the Moon is about 1/6th that on Earth, that is:

gM ~ 1/6 * gE.

Because of that , the weight of an object measured near the Moon's surface is

WM ~ 1/6 * WE.

(That gM ~ 1/6 * gE was DEMONSTRATED, on LIVE TELEVISION, by lunar astronauts in the early 1970s. A hammer and a falcon feather were dropped from rest, side by side, on the Mooon. They fell down, TOGETHER, at a very leisurely and stately rate compared to things falling freely here on Earth.)

Live long and prosper.

LATER EDIT: Re. your additional "Additional Detail":

"Also, What is the relationship between the mass of an object and the acceleration due to gravity on earth? how would the graph look like??"

There is NO RELATIONSHIP between the mass of an object and the acceleration due to gravity on earth !!" All things fall with the SAME acceleration gE. So the graph of the gravitational acceleration ga (as ' y ') versus M (as ' x ') would simply be the horizontal line ga = gE.

Answer 2

the mass would be 10.19kg.

and yes, the mass would be the same all over the universe. mass is basically just how much matter there is in a object vs weight which is how heavy an object is. so weight varies in the universe because gravity plays into how heavy an object would be. : )

Answer 3

That's correct. The mass of an object does not change.

Think of mass as the same as the number of pages in your physics text book. It is a count of how much matter is in the object.

Here on earth, your text book has a certain number of pages and also has a certain weight.

On the moon, your book would still have the same number of pages, but would weigh less.

The amount of matter (its mass) has not changed, but the amount of force we feel from that mass (its weight) has.

Answer 4

you are all correct.mass of an object is thre same whereever the object is. weight of an object at a certain place depends on the gravity at that place
W=mg, m=mass of the body, W= weight of the body, g= acceleration due to gravity which also varies from place to place and W varies accordingly.

Answer 5

Yes the mass is the same anywhere in the universe because you have the same amount of adoms in you anywhere in the universe. But the weight is different on the moon becuase theres less gravity there. I just learned this today. lol.

Answer 6

I am sorry but i am not sure what you are trying to find? Are you trying to find the weight? as in the n? Then you would simply plug in the 800 kg for the mass and the 9.8m/s^2 for the gravity to find the how much newtons are required.... i am getting this by your explanation.. if you want to further find the kg then divide 10N/kg by what ever newtons you find from n(weight)

Answer 7

yes, mass is the inherent feature of an object no matter wherever it is on.