Consider a stone at rest on the ground. There
are two interactions that involve the stone.
One is between the stone and the Earth; Earth
pulls down on the stone and the stone pulls
up on the Earth.
What is the other interaction?
1. between the stone and the ground
2. All are wrong.
3. between the Earth and air
4. between the ground and the Earth
5. between the ground and air
2006-10-16 13:18:20 · 11 answers · asked by xxlovexx 1 in Science & Mathematics ➔ Physics
Tricky. Look to the "laws" of inertia. Objects at rest tend to stay at rest (the rock). Objects in motion tend to stay in motion (the earth).
So we have centrifigal force and gravity.
You guess the rest.
2006-10-16 13:21:12 · answer #1 · answered by TiM 4 · 0⤊ 3⤋
If you mean significant interaction, it is between the stone and the ground. Gravity pulls the stone down with some force which is must be exactly balanced by the force upward by the ground for the stone to remain at rest.
To be pedantic, most of the others are true also, but are not relevent for this problem. Gravity acts on all particles, so there is a force between ground and air, Earth and air (else why doesn't atmosphere leave?) - and isn't the ground part of the earth?
2006-10-16 13:31:14 · answer #2 · answered by sofarsogood 5 · 0⤊ 1⤋
3, 4, and 5 are out because the don't involve the stone. 1 is out because the ground and the Earth are the same thing. Therefore it is the same interaction already mentioned. By process of elimination, the answer is 2. All are wrong.
2006-10-16 14:03:51 · answer #3 · answered by STEVEN F 7 · 0⤊ 1⤋
The other interaction is that the earth supports the stone, so that the joint gravitational attraction does not cause motion. The only answer in the list which is even close to this is #1 -- but it isn't very good.
2006-10-16 13:46:27 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Smaller Tomato
2006-10-16 13:32:08 · answer #5 · answered by GB123 2 · 0⤊ 1⤋
1, electrostatic repulsion between atoms of ground and stone.
Edit: Without this repulsion between electrons of ground and stone atoms, stone falls to the center of the earth.
2006-10-16 13:29:24 · answer #6 · answered by SAN 5 · 0⤊ 1⤋
Archimedes answered this one. He said no. 3
2006-10-16 13:22:07 · answer #7 · answered by Barks-at-Parrots 4 · 0⤊ 2⤋
3 again!
2006-10-16 13:21:01 · answer #8 · answered by Wing commander 3 · 0⤊ 2⤋
yes
2006-10-16 13:19:36 · answer #9 · answered by Anonymous · 0⤊ 2⤋
why didn't you take the blue pill ?
2006-10-16 18:37:03 · answer #10 · answered by Anonymous · 0⤊ 0⤋