Question

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Answer 1

✯✯ QUESTION ✯✯

1. Write the name and symbols of the following Element form Description :-

a)The atom Having smallest size.

b)The atom having smallest atomic mass

c)The most reactive nonmetal.

2.State and Explain Newton's Law of universal gravitation.

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✰✰ ANSWER ✰✰

1. Write the name and symbols of the following Element form Description :-

a)The atom having smallest size is Helium.The symbol of Helium is he.

b)The atom having smallest mass is Hydrogen.The symbol of Hydrogen is H.

c)The most reactive non-metal is Fluorine .The symbol of Fluorine is F.

2.State and Explain Newton's Law of universal gravitation.

★Newton Law of Universal Gravitation : -

✒Let us suppose two bodies A and B with masses ${m}_{1},{m}_{2}$ seperated by a distance d..

⠀⠀⠀(Refer to the attachment)

✒According to Newtons's law the force between the object of gravity is directly proportional to the product of their masses.

$\longmapsto\tt{F\:proportional={m}-{1}\times{{m}_{2}}}$---- (1)

✒Also foce is inversely proportional to the square of distance between them:.

$\longmapsto\tt{F\:proportional=\dfrac{1}{{d}^{2}}}$----(2)

➮On Combining Equation 1 and 2 :

$\longmapsto\tt{F\:proportional=\dfrac{{m}_{1}{m}_{2}}{{d}^{2}}}$

$\longmapsto\tt{F=G\dfrac{{m}_{1}{m}_{2}}{{d}^{2}}}$

✒G = Universal Gravitational Constant...

$\longmapsto\tt{G=6.673\times{{10}^{-11}}}$ Nm²kg-²...

✒Gravitational Force follows inverse square law.

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✔Importance of Universal Law of Gravitation : -

★It is the force that binds us to the Earth.

★It is the reason behind the motion of moon.

★The tides are due to the Gravitational Force between Moon and Sun...

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