# Need help with gravitation problem

• noname1
In summary, gravitation is a natural phenomenon that causes objects with mass to be attracted to each other. It is one of the four fundamental forces of nature and is related to the law of universal gravitation, which explains the mathematical relationship between the masses and distance of objects. The force of gravitation between two objects can be calculated using a specific equation. Mass and weight are different concepts in relation to gravitation, with mass being a measure of matter and weight being a measure of the force of gravity. The force of gravitation is essential for keeping objects on Earth from floating away and for determining the weight of objects. It also plays a role in the motion of celestial bodies.

#### noname1

Certain neutron stars (extremely dense stars) are believed to be rotating at about 50 rev/s. If such a star has a radius of 17 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation?

Attempt:

M = R³W²/G = (17000³ * (10pi)²) / (6.67x10^-11) = 7.270 x 10^25 but the answers is wrong, what am i doing wrong?

never mind got it

## 1. What is gravitation?

Gravitation, also known as gravity, is a natural phenomenon by which all objects with mass are brought towards each other. It is one of the four fundamental forces of nature.

## 2. How is gravitation related to the law of universal gravitation?

The law of universal gravitation states that every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This is the mathematical explanation of gravitation.

## 3. How do you calculate the force of gravitation between two objects?

The force of gravitation between two objects can be calculated using the equation F = G (m1m2)/r^2, where F is the force of gravitation, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them.

## 4. What is the difference between mass and weight in relation to gravitation?

Mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity acting on an object. The mass of an object does not change, but its weight can change depending on the strength of the gravitational force acting on it.

## 5. How does the force of gravitation impact objects on Earth?

The force of gravitation is what keeps objects on Earth from floating away into space. It also determines the weight of objects on Earth and is responsible for the motion of celestial bodies, such as the moon orbiting around the Earth.