What is the gravitional acceleration near the surface of the star?

AI Thread Summary
The discussion focuses on calculating the gravitational acceleration near the surface of a neutron star, specifically one with a mass of 1.99e+030 kg and a radius of 10.8 km. Participants note that the gravitational acceleration should be calculated from the center of the star rather than using the diameter. Additionally, there is a comparison made to the gravitational acceleration on the moon, which is 1.622 m/s², and a question about how far an object must be from Earth to weigh the same as it does on the moon. The calculations presented for both scenarios encounter difficulties, indicating a need for clarification on the formulas used. Understanding gravitational acceleration in these contexts is crucial for accurate astrophysical calculations.
missfearless017
Messages
3
Reaction score
0
Neutron stars are extremely dense objects with a mass comparable to the mass of the sun but a radius of only several thousand meters. Consider a neutron star of mass M = 1.99e+030 kg and a radius of R = 10.8 km.

What is the gravitational acceleration near the surface of the star?

I tried using the equation gstar = G * mass / diameter^2 but that didn't work.
 
Physics news on Phys.org
You should be calculating the strength of the field (the acceleration) from the centre of the neutron star.
 
ok here's another one.

the gravitational acceleration on the surface of the moon is 1.622 m/s^2. An object weighs 9.8333 N on the moon (mass is 6.01427 kg). How many Earth radii must this same object be from the surface of the Earth if it is to weigh the same as it does on the surface of the moon?

I tried to calculate this one with g(moon) = G(mass of earth)/(nr)^2 but it didn't work.
 
Last edited:

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Similar threads

Find the energy which was released when the 'Death Star' was destroyed
Replies
6
Views
2K
What is the Minimum Mass for a Rotating Neutron Star?
Replies
6
Views
2K
Newton's law of universal gravitation
Replies
2
Views
1K
Acceleration of Planet/Sun System
Replies
3
Views
1K
Gravitational Potential Energy questions near the surface of a planet
Replies
8
Views
2K
I How Does the Size of Neutron Stars Compare to Black Holes?
Replies
48
Views
5K
Rotational Motion (Neutron Star)
Replies
1
Views
1K
I Energy Released From Dropping Things Onto Neutron Stars
Replies
20
Views
2K
What would be the approximate rotation of the sun if....
Replies
7
Views
2K
B Neutron star 4U 1820-30 spins at 716 revolutions per second
Replies
0
Views
2K

Hot Threads

Recent Insights

Back
Top