Changes: Gravity

Revision as of 15:18, 31 January 2015

Gravity is a force of mutual attraction between two bodies by virtue of their masses. On earth, the force of gravity on an object is equal to 9.8 N/kg; therefore, all falling objects accelerate at 9.8 m/s². According to Newton's Law of gravitation: Given masses m₁ and m₂ at a distance of r, the force between them is equal to

F = G \frac{m_1 m_2}{r^2}

G is the gravitaional constant, equal to 6.673×10−11 N·(m/kg)².

The same two masses will have a potential energy of

E_{p}=-G{\frac {m_{1}m_{2}}{r}}

Gravity is a central force i.e. it acts along the line joining the centres of the two bodies. It is a conservative force and thus the work done by the gravity on an object is path independent.

Cause

Gravitational force is believed to be caused by the exchange of yet to be discovered particles called gravitons.

Fundamental force

Gravitational force or Gravity is one of the four fundamental forces of the Universe. Gravity is the weakest force in the universe yet it plays an important role in making the planets revolve around a star or does not let anybody get accelerate away from the earth if they jump.

@@ Line 1: / Line 1: @@
-'''Gravity''' is a force that attracts all objects with mass. On earth, the [[force]] of gravity on an object is equal to 9.8 N per kg; therefore, all falling objects [[acceleration|accelerate]] at 9.8 m/s<sup>2</sup>.
+'''Gravity''' is a force of mutual attraction between two bodies by virtue of their masses. On earth, the [[force]] of gravity on an object is equal to 9.8 N/kg; therefore, all falling objects [[acceleration|accelerate]] at 9.8 m/s<sup>2</sup>.
+According to Newton's Law of gravitation:
 Given masses ''m<sub>1</sub>'' and ''m<sub>2</sub>'' at a distance of ''r'', the [[force]] between them is equal to
@@ Line 7: / Line 7: @@
 ''G'' is the gravitaional constant, equal to 6.673×10−11 N·(m/kg)<sup>2</sup>.
 The same two masses will have a [[potential energy]] of
 :<math>E_p = - G \frac{m_1 m_2}{r}</math>
+Gravity is a central force i.e. it acts along the line joining the centres of the two bodies. It is a conservative force and thus the work done by the gravity on an object is path independent.
-{{Stub}}
+==Cause==
+Gravitational force is believed to be caused by the exchange of yet to be discovered particles called ''gravitons''.
+==Fundamental force==
+Gravitational force or '''Gravity''' is one of the four fundamental forces of the Universe. Gravity is the weakest force in the universe yet it plays an important role in making the planets revolve around a star or does not let anybody get accelerate away from the earth if they jump.
 [[Category:Gravitation]]
 [[Category:Dynamics]]