Cheat Sheet

U Can: Physics I For Dummies Cheat Sheet

From U Can: Physics I For Dummies

By Steven Holzner, Daniel Funch Wohns

Have all of the relevant physics information you’ll need to solve kinematics, force, energy, and thermodynamics problems at your fingertips with these handy physics equations and constants. Here, you find important physics equations to remember, five useful physical constants, and common moments of inertia equations.

Important Physics Equations to Remember

Many people find Physics to be a difficult subject to approach. Well now, you have some tools to help you along the way. This handy list of physics equations organized by topic contains the most common equations you’ll run across.

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5 Useful Physical Constants

Physicists love to go out and measure properties of the world around us. If you are hoping to get a better grasp on physics, these properties are useful information. Here are some of the most useful physical constants:

  • Gravitational constant:

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  • Avogadro’s number:

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  • Boltzmann’s constant:

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  • Gas constant:

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  • Stefan-Boltzmann constant:

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Moments of Inertia in Physics

In physics, the moment of inertia measures how resistant an object is to changes in its rotational motion about a particular axis. Here are some of the most common moments of inertia:

  • Solid cylinder or disk of radius r rotating about its axis of symmetry:

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  • Hollow cylinder of radius r rotating about its axis of symmetry:

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  • Solid sphere of radius r rotating about its center:

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  • Hollow sphere of radius r rotating about its center:

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  • Thin rod of length r rotating about its middle:

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  • Thin rod of length r rotating about one end:

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