Circular Orbital Speed
mechanics · gravitation
Gives circular-orbit speed around a spherical mass in the two-body approximation.
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Escape Speed
mechanics · gravitation
Gives the minimum ideal launch speed to escape a spherical mass from radius r.
Hooke's Law
mechanics · periodic motion
Models the restoring force of an ideal linear spring.
Spring Potential Energy
mechanics · periodic motion
Gives energy stored in an ideal linear spring.
Mass–Spring Period
mechanics · periodic motion
Gives the period of an ideal mass–spring oscillator.
Simple Pendulum Period
mechanics · periodic motion
Gives the period of a small-angle simple pendulum.
Frequency and Period
mechanics · periodic motion
Relates the number of cycles per time to one-cycle duration.
Density
mechanics · fluids
Relates mass to occupied volume.
Pressure
mechanics · fluids
Relates a normal force to the area over which it acts.
Pressure in a Static Fluid
mechanics · fluids
Gives pressure at depth h in a fluid of uniform density.
Buoyant Force
mechanics · fluids
Gives buoyant force from displaced fluid volume.
Volume Continuity Equation
mechanics · fluids
Relates cross-sectional area and speed in steady incompressible flow.
Bernoulli's Equation
mechanics · fluids
Relates pressure, elevation, and speed along a streamline.