Spin and gravity of earth, no math

AI Thread Summary
If the Earth suddenly stopped spinning, satellites would lose their orbits, one hemisphere would overheat while the other would freeze, and the moon could potentially collide with Earth due to the loss of centripetal force. If Earth lost its gravitational pull, everything would experience weightlessness, causing objects to lift off the ground, and the moon would drift away. The Earth would also wobble off its tilted axis and could fall out of its orbit around the sun. The energy required to halt the Earth's spin would likely lead to catastrophic melting. The discussion highlights the significant consequences of changes to Earth's rotation and gravity.
fenixbtc
Messages
13
Reaction score
0

Homework Statement


A. what would happen if the Earth suddenly stopped spinning
B. what would happen if the Earth lost it's gravitational pull

Homework Equations



The Attempt at a Solution


these are some ideas i have, can you tell me if they are correct or not, and some ideas you may have as well.
A.
-satellites would fly out of orbit due to angular momentum
-one side of Earth would overheat, the other freeze
-moon would collide with earth, no centripetal force to keep it away
B.
-everything would be weightless and momentum of spinning Earth would cause everything to lift up into the air
-moon would fly away, Earth fall off of it's tilted axis and wobble
-earth would fall out of orbit with sun?
 
Physics news on Phys.org
A
The amount of energy required to stop the Earth would probably make it melt.
Gravity would still work.
Problem does not say anything about the moon stopping in its tracks. If it did, yes, moon and Earth would collide, otherwise it would keep on orbiting.
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top