Physics Gravitation

8.12

Mass of the Sun, $M_s$ = $2\times {10}^{30}$ kg, Mass of the Earth, $M_e$ = $6\times {10}^{24}$ kg

Orbital radius, r = $1.5\times {10}^{11}$ m

Let the mass of the rocket be, m

Let x be the distance from the centre of the Earth where the gravitational force acting on satellite P becomes zero.

From Newton’s law of grav

Ans.8.1

(a) No. Unlike electrical forces, gravitational force is independent of the status of the objects.

(b) Yes, the size of the space station is large enough and the astronaut will detect the change in Earth's gravity.

(c) Tidal effect depends inversely upon the cube of the distance

When there is no normal force acting on a body, weightlessness is experienced, and the body free fall under gravity. The concept of gravity is still acting on the body, however, there is no weight sensation of any reaction force from any surface or ground. The weightlessness felt by the astronauts i

When there is no normal force acting on a body, weightlessness is experienced, and the body free fall under gravity. The concept of gravity is still acting on the body, however, there is no weight sensation of any reaction force from any surface or ground. The weightlessness felt by the astronauts i

It is due to a concept taken from Newton's Law of Gravitation. It says that each mass element of the shell puts an attractive force on a particle inside but due to the fact that the shape of the shell is symmetrical, these forces cancel out in every direction.
To prove it mathematically, one can use

Gravitational Potential Energy (U) is the energy an object has due to its position in a gravitational field. It is defined as:

Where M represents the mass of the larger body, m is the mass of the smaller body, r is the distance between them, and G stands for the gravitational constant.
G is written w

Kepler's laws refer to the motion of planets around the Sun and it offers various insights into the celestial mechanics. It includes the following:

• The First Law (Law of Orbits) states that all planets move in elliptical orbits, and the Sun is at one focus. It is against the previous belief that plan

According to Newton's Law of Universal Gravitation, each object in the universe attracts every other object with a force that depends on the distance between them and their masses. This force is mathematically given by the following formula:

Here, F is the gravitational force, G is the gravitational