**Classical Mechanics** is a field of physics that is used for **studying the motion of objects**. For example – Observing and understanding the motion of a ball thrown in the air comes under field of Classical Mechanics. As studying motion of objects involves a number of physical quantities like mass, velocity etc. that’s why **Système International d’Unités**(French Words) in short **SI** have defined certain rules about **measurement of these quantities**, which are globally accepted and are used across all the countries.

In this article, I have put together all of **SI Units** which are used in **Classical Mechanics** as a table, I hope this article help you.

Physical Quantity | Physical Quantity Symbol | Mathematical Formula | SI Unit of Physical Quantity |
---|---|---|---|

Mass | m | kg | |

Reduced Mass | μ | μ = m_{1}m_{2} / (m_{1} + m_{2}) | kg |

Density | ρ | ρ = m/V | kg m^{-3} |

Relative Density | d | d = ρ/ρ^{0} | 1 |

Surface Density | ρ_{A}, ρ_{S} | ρ_{A} = m/A | kg m^{-2} |

Specific Volume | υ | υ = V/m = 1/ρ | m^{3} kg^{-1} |

Momentum | p | p = mv | kg ms^{-1} |

Angular Momentum | L | L = r x p | J s |

Moment of intertia | I | kg m^{2} | |

Force | F | F = dp/dt = ma | N |

Moment of Force or Torque | M or T | M = r x F | N m |

Energy | E | J | |

Potential Energy | E_{p} , V, Φ | J | |

Kinetic Energy | E_{k}, T, K | J | |

Work | W, A, w | J | |

Power | P | P = F.v = dW/dt | W |

Lagrange Function | L | J | |

Hamilton Function | H | J | |

Action | S | J s | |

Pressure | p, P | p = F/A | Pa, N m^{-2} |

Surface Tension | σ | N m^{-1}, J m^{-2} | |

Weight | G | G = mg | N |

Gravitational Constant | G | F = Gm_{1}m_{2}/r^{2} | N m^{2} kg^{-2} |

Normal Stress | σ | σ = F/A | Pa |

Shear Stress | τ | τ = F/A | Pa |

Linear Strain | ε | 1 | |

Modulus of elasticity or Young’s Modulus | E | E = σ/ε | Pa |

Shear Strain | γ | 1 | |

Shear Modulus or Coulomb’s Modulus | G | G = τ/γ | Pa |

Volume or Bulk Strain | 1 | ||

Bulk or Compression Modulus | K | Pa | |

Dynamic Viscosity | η | Pa s | |

Fluidity | m kg^{-1} s | ||

Kinematic Viscosity | m^{2} s^{-1} | ||

Sound Energy Flux | P, P_{a} | P = dE/dt | W |