All Questions
10
questions
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So I've found out heavier objects technically do fall faster? [duplicate]
Given the Earth's mass to be $M_E$, I know that $F_G = -\frac{GM_Em}{d^2}$, so the gravitation acceleration of a mass towards Earth is $g = -\frac{GM_E}{d^2}$. But what about the force exerted by the ...
3
votes
1
answer
95
views
Can a pendulum at resting equilibrium position still demonstrate the Earth's rotation?
I conducted an experiment in my youth, creating a 'sand pendulum' hanging from the bedroom ceiling to a bowl of flour. I did not set the pendulum into motion, but rather wanted to see if the force of ...
- 31
3
votes
1
answer
1k
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Will an object dropped from a high building displace due to the Earth's rotation?
I read that in the 16th and 17th century, the question of whether the Earth rotates around its axis or all celestial bodies rotate around it was extensively debated. One of the anti-rotation arguments ...
- 433
0
votes
4
answers
7k
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What is acceleration due to gravity at the centre of the earth? [duplicate]
When I asked my teacher that what is the acceleration at the centre of earth, he replied that it is 0 as when we move inside the earth, the effective mass decreases i.e. the mass that exerts ...
- 592
0
votes
1
answer
178
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Why is the gravitational pull equal on all sides of the Earth"?
I understand that the Earth moves through the solar system at an extremely fast rate, but a question occurred to me as I reflected on this piece of knowledge: Does the speed of the Earth traveling at ...
- 285
3
votes
2
answers
2k
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Would the Foucault pendulum experiment work on a rotating flat Earth?
If the Earth were to be flat, but still rotating with a constant angular frequency, would the Foucault pendulum still show it's precessing motion?
The angular velocity of the precession can be ...
- 1,438
0
votes
3
answers
228
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Throwing a ball causes Earth to move away
I understand that the Earth "falls" towards the ball on its descent, as a result of the attractive gravitational force on the two. However, I've been stuck on trying to explain the reverse scenario; ...
- 59
0
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3
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3k
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Intuition $\neq$ Diagram: Weight on North Pole vs Equator
This is a common physics exercise:
Suppose the earth is a sphere of radius $6370$ km. If a person stood on a scale at the north pole and observed the scale reading (his weight) to be $mg$, what ...
- 1,493
0
votes
1
answer
642
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Does Earth get gravity due to it's spinning? [duplicate]
Consider my example below.
Example: 1. A man standing on grass(point) on earth surface.
2. He jumped.
3. And returned back, and he could find the same grass(point) under his foots. Right?
If earth is ...
- 13
37
votes
5
answers
22k
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Why can't we feel the Earth turning?
The Earth turns with a very high velocity, around its own axis and around the Sun.
So why can't we feel that it's turning, but we can still feel earthquake.
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