All Questions
14
questions
2
votes
1
answer
72
views
Will a man acquire orbit if we suppose Earth is rotating fast enough?
if we consider that the rotation of earth is mush faster (30000km/h), so if a man standing on earth jumps 1 meter above will it acquire orbit if we ignore atmospheric friction
- 21
0
votes
2
answers
83
views
Why can't we feel Earth's acceleration? [duplicate]
The centripetal force on Earth is constantly exposing Earth to the acceleration. Why can't we feel this change of direction?
- 1
1
vote
2
answers
486
views
If everyone on Earth jumped at the same time, is it possible to steer the Earth?
Newton's third law states that in every action, there is a equal and opposite reaction.
When we jump, we exert a force on the ground and the resultant force upwards propels us up into the air. However,...
- 41
1
vote
1
answer
282
views
Energy required to tilt Earth’s axis by 90 degrees? [closed]
How much energy would be required to tilt Earth’s rotation axis in such a way that what is now poles would be where to equators are relative to Sun and vice versa?
- 383
0
votes
1
answer
95
views
Solving global warming by moving Earth closer to Mars
One way to reduce global warming is to get our planet farther away from the Sun.
If we placed a couple of thousands of SpaceX's Merlin rockets upside down in the tropics or Sahara i.e. somewhere where ...
- 131
1
vote
4
answers
516
views
Can we stop the Earth from spinning?
When we walk on the ground, we push the ground backward and hence the ground pushes us forward and we change our position. The effect of our force on the Earth is very minute (literally negligible) ...
- 8,230
0
votes
3
answers
42
views
Could traffic acceleration/deceleration change the rotation of Earth? [duplicate]
For example at a stop light where multiple cars and trucks are accelerating at the same time all the torque from all the vehicles.
2
votes
1
answer
102
views
How much does NASCAR affect the rotation of the Earth? [duplicate]
Many of us will be familiar with XKCD 162: Angular Momentum, in which someone spins counterclockwise to slow down the rotation of the earth and make the night longer.
The mass of an individual human ...
- 133
0
votes
2
answers
86
views
Would we levitate before a collision with a massive object?
Let's imagine a massive object $M$, about to enter in collision with Earth on west Europe. This object is way more massive than Earth. Before the collision, is there any objects on Earth that will be ...
- 101
3
votes
2
answers
299
views
Reaction due to gravity
There is a reaction to the gravity of the earth on us but the earth does not move due to its huge mass. But what if I combine the weight of all humans and other things on Earth? Is it not enough to ...
- 785
1
vote
2
answers
130
views
Saturn V horizontally attached to Earth
If the Saturn V rocket were attached to the ground facing in the opposite direction of the Earth's spin, would it in anyway slow the Earth's spin on its axis? How significant of an impact would it ...
- 195
1
vote
2
answers
663
views
7 Billion people jumping at once
What would happen if every person in the world gathered at a minimum possible area and jumped all at once? Would that have any effect on Earth?
- 2,983
8
votes
4
answers
12k
views
Effect on length of day as the polar ice caps melt
If the polar ice caps of the Earth melt, how will the length of the day be affected?
- 247
6
votes
4
answers
3k
views
Can human push Earth away from the Sun?
It's said the earth is approaching the sun. Can we push it away little by little?
Although we can emit rocket towards the sun, but it's too expensive to make a rocket:
So I think maybe we can ...
- 255