All Questions
Tagged with newtonian-gravityhomework-and-exercises
889 questions
4votes
1answer
100views
Comparision of time taken between two points along different paths [closed]
I was wondering about a question which is as follows we have a body if mass $m$ at point (1,1) on the cartesian plane and gravity is acting along $-y$ axis. If we release the ball and there are $n$ ...
1vote
0answers
38views
Finding area swept around star, application of Kepler's 2nd law [closed]
Problem: A Sun-orbiting periodic comet is the farthest from the Sun at 31.5 AU and the closest from the Sun at 0.5 AU. What is the area (in square AU per year) swept by the line joining the comet and ...
- 11
1vote
2answers
82views
What is the Dimensional Formula of Acceleration Due To Gravity? How to derive it? [closed]
Dimensions can refer to the minimum number of coordinates needed to specify a point within an object, or the power to which fundamental quantities are raised to express a physical quantity, So what is ...
- 21
2votes
1answer
82views
What is the maximum displacement at which a series of blocks can be displaced vertically?
This is a really simple question that I've been thinking. The statement is as following: Consider you have a series of blocks, each of length $l$, width $w$, height $h$, and mass $m$ wich is evenly ...
3votes
6answers
375views
Is there a curve such that a ball rolling down it has constant velocity? [closed]
I tried using this approach to solve another problem, however I couldn't find anything no matter how hard I tried. I am not really familiar with problems of this sort and mechanics in general. Because ...
- 33
5votes
1answer
209views
"Pressure" due to gravitational compression in a uniform sphere
I was trying to solve the following problem from the book Problems in General Physics by I.E. Irodov: 1.216: A uniform sphere has a mass M and radius R. Find the pressure p inside the sphere, caused ...
0votes
0answers
62views
What is the "compression force" in spaghettification?
15.2 (a) $M=0.5M_{\odot}$, $a=0.49\times10^9\mathrm{ms^{-2}}\approx4\times10^7g$. (b) A standing astronaut will be subject to a stretching tidal force. The gravitational acceleration felt by the feet ...
-1votes
2answers
60views
Need clarification about gravitational potential energy and total mechanical energy
Consider this situation: "mass $m_1$ and mass $m_2$ are at the same height. $m_2$ is greater than $m_1$. If we define their current position to have zero potential energy, they have same ...
- 9
0votes
0answers
112views
How do I calculate the time it would take for the Earth to fall into the Sun? [duplicate]
I'm trying to calculate how long it would take the Earth to fall into the Sun if it lost all of its tangential velocity. Below is my best attempt, but no matter what I keep getting an incorrect answer ...
0votes
0answers
13views
Calculating time for acceleration varying with distance [duplicate]
Question is basically the title Like if something is falling towards a body with mass M (mass is not that big so Newtonian equations will be fine) from a distance x from it's center. How long will it ...
5votes
3answers
325views
How would I calculate the gravity at a given depth on a planet with two distinct layers with different densities?
If you assume a planet to be one density then gravity just scales linearly from the centre to the surface, and you can use the surface gravity equation. How would you go about working out the gravity ...
- 153
1vote
0answers
132views
How Strong does the tidal force has to be to pull debris off a planet?
How strong do tidal forces have to be to rip stuff off of a planet? I have this question: A planet covered in loose debris with radius $r$ orbits a black hole of mass $M=1\cdot 10^{35} \text{ kg}$ in ...
- 31
3votes
3answers
129views
Downward Acceleration of a Falling Chimney's Tip
I was checking out this explanation on Harvard’s site about why the top of a falling chimney seems to fall faster than gravity (https://sciencedemonstrations.fas.harvard.edu/presentations/falling-...
- 31
0votes
0answers
67views
Rocket equation non-constant gravity
I am currently trying to teach myself differential equations and wondered about the following problem. You have an object (a rocket of constant mass $m_r$) and initial velocity $v_0$ that tries to ...
- 253
0votes
1answer
48views
Integrating acceleration + escape velocity over distance [closed]
I am not sure how to title this question so apologies if it's inaccurate. If I throw an object at thrice the escape velocity of earth, what would be its velocity very far away from earth, (at a ...
- 128
