All Questions
Tagged with earth newtonian-mechanics
132
questions
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Why the density have anything to do with initiation of subduction?
No matter wherever I read the process of subduction, I always find this one sentence which says "when the two tectonic plates collide the denser plate gets subducted under the lighter plate ...
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1
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How exactly did Harrison's chronometer circumvent the impulse problem of time-keeping on a moving ship?
According to folklore, around the time of the exploration of the New World, there was a quandary regarding how to measure time on the open sea. Time keeping then was based on the pendulum clock, which ...
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Effect of rotation of earth on levitating objects [duplicate]
If a drone is designed, such that it applies a constant force equal to it's weight ($mg$) on air, to maintain a constant elevation (say of 10 meters). What will happen when considerable time has ...
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Would a giant ball on earth roll towards the poles?
The radius of the earth is higher at the equator than at the pole. Would it mean then, that if I put a giant ball at the equator, it would roll up towards the pole? Why, why not?
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If the tidal bulge on the earth speeds the moon up, how does the moon move to a higher orbit?
I understand that the moon causes a tidal bulge on Earth, and this tidal bulge moves slightly ahead of the moon due to Earth's rotation.
When reading about why the moon is moving away from the Earth, ...
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Has a heavier atmosphere and the relocation of oil around the Earth had a measurable effect on the rotation of the Earth?
I am wondering if the man-made carbon emissions put in the Earth's atmosphere over the past 100+ years, and also the relocation of oil around the Earth over this same time period, has had any ...
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Which gravitational differences we would feel if the sun disappeared?
I would like to start by stating that I'm not a physicist, I'm purely a curious individual.
I've been speculating about the differences the loss of the sun's gravitational field would have on us and ...
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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
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Will the moon ever proceed to lose its orbit and hit the earth?
Assume that the moon it orbiting the earth in a circular trajectory.
It will experience an acceleration directed towards the centre of the earth given by $\frac{GM}{R^2}$ where $G$ is the universal ...
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Coriolis effect and Cyclones
The Coriolis force predicts that winds in the northern hemisphere should be deflected in a clockwise pattern and winds in the southern hemisphere should be deflected in an anti-clockwise pattern. Why ...
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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?
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Does the earth exert centrifugal force on us in air? [closed]
Whether the centrifugal force exerted by earth due to rotation be felt or even applied to us if we were in air ? The landmass rotates with earth so it is exerted on us radially outwards , but that isn'...
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Getting 600 n/kg when calculating the gravity for Earth [closed]
Basic Problem:
So, I'm trying to figure out how to calculate the gravitational force of the earth. I am using Desmos to graph the equation so that will explain where $x$ and $y$ come from. Whenever I ...
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Centre of Gravity of Earth-Moon Elevator [closed]
Suppose you have a cylindrical elevator that resembles a rod of mass $m$, cross-sectional area $A$ and uniform density $\rho$, with a length $L$ spanning the distance between the Earth and the Moon. ...
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Is Earth's surface gravity termed $g$ derived from Newton's universal law of gravity?
Trying to apply the basic Newton law $F = m a$ to a falling apple and a paper clip I encountered a problem I consider a beginner's: The fact that all objects are subject to the same acceleration ...
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If the Earth and the Moon were smaller, would moon tides be more or less intense?
If the Earth and Moon were smaller (and everything on them too, but keeping the same average density and the same "relative" distances, I mean... the same proportions!), would the tides ...
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A new way of travel or not? [duplicate]
What if you somehow go up straight into sky (assuming that you go up without any displacement in any other direction), would you land on the same spot from where you went up? If not, where could you ...
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Can I argue that the Earth's surface is an inertial reference to explain why we can't feel it's rotation? [duplicate]
Passengers on a plane cannot feel the plane move when it's at cruise speed. Can the same reasoning be extended to earth's rotation to explain why we cannot feel it rotate even though it's rotating at ...
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NASA's explanation on tidal acceleration
I've found an animation in NASA's website, illustrating tidal acceleration effect between the moon and earth.
It's the forth animation from the top in this page:
https://moon.nasa.gov/moon-in-motion/...
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What's responsible for the earth to rotate and for the objects on it to rotate with it? [duplicate]
Three questions arose to me:
The first is what is responsible for the earth spinning? Is this just newton's first law in action - having been formed out of the material in the cluster of clouds after ...
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How much should I dig a hole to set a post?
I need your help to solve this problem
We suppose that we have a post pulled by
$N=4$ barbed wires separated a distance $dh = 30 \text cm$, and that each wire pulls with a force of
$F=300\text N$ . ...
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3
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Would a projectile launched with the escape velocity reach a final velocity of 0 as time approached infinity?
I just wanted to check my understanding of escape velocity.
If a projectile was to launch and have the exact velocity as the escape velocity of the earth,
it would have a final velocity of 0 correct?
...
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394
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What is Earth's linear velocity around the Sun?
I am creating a theoretical model of the Earth's tangential acceleration around the Sun (on an elliptical orbit, not circular). First, I will build a theoretical model, which is not influenced by any ...
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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 ...
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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,...
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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?
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How can i analyse this motion?
Hello
(Im from south Korea. im sorry for my english in physics.)
im curious about this gravitational spiral motion.
can its trajectory and time took to collide be guessable? or can i calculate this ...
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If an angled mirror is bolted to the equator, does the Earth change speed?
After reading If a jet engine is bolted to the equator, does the Earth speed up? I came to think of solar sails.
If an angled mirror is bolted to the equator, will it change the speed of the earth ...
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If a jet engine is bolted to the equator, does the Earth speed up?
If a jet engine is bolted to the equator near ground level and run with the exhaust pointing west, does the earth speed up, albeit imperceptibly? Or does the Earth's atmosphere absorb the energy of ...
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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 ...
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470
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How Newton weighed the mass of the earth without gravitational constant $G$?
I am only wondering about how Newton weighed the mass of the earth if he didn't have the value of gravitational constant $G$, so how he did it? I read about some explanations but i hadn't understand ...
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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) ...
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278
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How would a rope around Earth fall? [duplicate]
I have searched and saw a similar question but i dont know if it's exactly the same.
If I had a rope around earth, let's say a few meters above (and supposing a flat surface, and suddenly dropped it ...
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60
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Why don't hovercrafts move West relative to the Earth [duplicate]
Suppose that there is a hovercraft floating a few centimetres above the Earth's surface. As it is disconnected from the Earth, which is spinning from West to East, shouldn't it appear to move East to ...
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Deriving gravitational acceleration from the formula for the force of gravity [closed]
I'm trying to derive this $g = 9.8 m/s^2$ from this
$$F = G\frac{m_E\cdot m_2}{(r)^2}$$
So I did:
$$g = G \frac{(5.972\cdot 10^{24}kg)}{(6.371km)^2} \Leftrightarrow \\
g = 6.67\cdot10^{-11}Nm^2/kg^...
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4
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510
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Should the centripetal force of Earth's orbit around the Sun affect a pendulum on Earth?
Lets use approximate earth angular velocity around the sun with $\omega\approx2*10^{-7}\frac{r}{s}$ and earth translation orbit radius with $r\approx1.5*10^{11}m$ we can approximate centripetal ...
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Would the moon eventually hit the Earth?
The moon is rotating around the earth in elliptic or approximately circular orbit with speed $v$. Its acceleration have two components tangential and radial one. It is the radial acceleration ...
user230437
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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.
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What is the reason for the orbital movement of the Foucault pendulum?
The Foucault pendulum, now in exhibition at the Paris Pantheon, is 67 meters high, with a period of oscillation about 16 s. Its oscillations last for more than one hour, when an employee manually ...
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Placement of the spaceports on our Earth
Why are spaceports located at certain points (site/place) on our Earth?
Is there a physical reason I don't really know about?
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Why is the Earth not an inertial frame of reference?
From many sources I have found the explanation that the Earth is not an inertial frame of reference because it rotates around its axis.
However, nobody mentions the rotation about the Sun.
What I ...
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Why ball fall at same location from where we throw it? [duplicate]
I have a silly question. As we all know earth is rotates at a speed of 460 m per sec. So if I throw a ball in the air for 10 sec than the ball must fall 4600 m away from me but these does not happen ...
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Does a helicopter that simply hovers remain in the same spot on earth? [duplicate]
Ignoring statistical variation in wind, will a helicopter that only applies force perpendicular to a perfectly sphere earth remain in the exact same spot relative to the earth?
I am arguing with ...
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Question About Gravity vs. Earth’s Rotation [duplicate]
If a bullet was fired perfectly straight up (assuming a windless environment) such that the peak of its trajectory was just shy of orbit, would it fall back to Earth in the same spot, or would Earth’s ...
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Estimating the Pressure of Earth's Center
The pressure of a medium of density $\rho$ and in a graviational field with strength $g$ at a depth of $z+dz$ is equal to the pressure at $z$ plus the pressure caused by the weight of a slab of volume ...
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How does the Earth's radial acceleration affect it's velocity during orbit around Sun? [closed]
When the earth moves along its ellipse at $67,000mph $ it accelerates at $0.006m/s^2$ would it be correct to say it's speed at some points relatively increases by $0.006m/s$ every second
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What's the Earth's linear acceleration component around the Sun?
The earth's centripetal acceleration around the Sun is $0.006m/s^2$ does this mean one can say the earth's acceleration when it travels(revolves) at $670,000mph$ is simply equal to its centripetal ...
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Is Earth an inertial reference frame?
Is earth considered as inertial frame? I was confused because we learned about Coriolis effect. We know that earth spins therefore Coriolis effect should take place . But does it have minimal effect ...
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Confusion about angular momentum of earth-moon system
My assumed definition of angular momentum is the sum over $i$ of $L_i =r_i\times{\omega_i}\times{r_i}$ for each particle about some origin.
We have two spheres rotating about the centre of orbit. For ...
user86425
2
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1
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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 ...
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