Question

In all unit tests me in algebra

1st unit test. 8
2nd unit test. 8
3rd unit test. 8
hatrick

what is GRAVITY??​

Answer 1

Answer:

Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.

Answer 2

Question:

What is gravity ?

$\boxed{\green{\sf\blue{Gravity:}}}$

➵ Gravity is a force which attracts anything towards the centre of the earth.

Example :- Attraction of meteors to the earth.

$\boxed{\green{\bf\blue{Law\:of\: gravitation:}}}$

➵ Every object in the universe attracts every other object with a force which is proportional to the product of their masses andinversely proportional to the square of the distance between them. the force is along the line joining the centres of two objects.

Formula :

$\pink{\boxed{\green{\sf\red{F=G\dfrac{m_1m_2}{d²}}}}}$

Formula Derivation:

➵ Let, two objects A and B of masses M and m at a Distance d as shown in the figure. Let the force of attraction between two objects be F .According to the universal law of gravitation the force between two object isdirectly proportional to the product of their masses.That is,

$\boxed{ \red{ \bf \: F\propto M\times m}}\:-----(1)$

➵ And the force between two object is inversely proportional to the the square of the distance between them , That is,

$\boxed{ \red{ \bf \: F\propto \frac{1}{d^{2}}}} \:----(2)$

➵ Combining equation 1 and 2 ,

$\implies \boxed{ \red{ \bf \:F = G \: \frac{M \times m}{d ^{2}}}}$

➵ Where G is the constant of proportionality and is called the universal gravitation constant.