"भौतिकी के सूत्र" (अनुभाग) सम्पादित करें

== गुरुत्वाकर्षण (Gravitation) ==
{| class="wikitable"
|-                                       
|[[gravitational constant]]
|<math>G</math> <small>(force)(distance/mass)^2</small>
|-                                       
|[[gravitational force]]
|<math>f_G = Gm_1m_2/r^2</math>
|-
|[[Superposition principle|superposition]] applies
|<math>\mathbf{F} = \Sigma \mathbf{F}_i = \int d\mathbf{F}</math>
|-
|[[gravitational acceleration]]
|<math>a_g = Gm/r^2</math>
|-
|[[free fall]] acceleration
|<math>a_f = a_g - \omega^2R</math>
|-
|[[shell theorem]] for gravitation
|
|-
|[[potential energy]] from gravity
|<math>U = -Gm_1m_2/r \approx ma_gy</math>
|-
|[[escape speed]]
|<math>v = \sqrt{2Gm/r}</math>
|-
|[[Kepler's law]] 1
|planets move in an ellipse, with the star at a focus
|-
|[[Kepler's law]] 2
|<math>A'' = 0</math>
|-
|[[Kepler's law]] 3
|<math>T^2 = (4\pi^2/Gm)r^3</math>
|-
|[[orbital energy]]
|<math>E = - Gm_1m_2/a2</math>
|-                                       
|[[standard gravity]]
|<math> a_g = Gm_{Earth}/r_{Earth}^2 \approx 9.81m/s^2</math>
|-
|[[weight]], points toward the center of gravity
|<math>f_g = -f_n = mg </math>
|-
|[[path independence]]
|<math>W_{ab,1}=W_{ab,2}=\cdots</math>
|-
|[[Einstein field equations]]
|<math>R_{\mu \nu} - {1 \over 2}g_{\mu \nu}\,R + g_{\mu \nu} \Lambda = {8 \pi G \over c^4} T_{\mu \nu}</math>
|}