Galilean Laws

Tip: Remember that Galileo focused on terrestrial motion of falling and horizontal motion. Use an acronym like: GaLa_Te

• Ga: Gravity: “Objects Gain free fall have a con_Ga_nt acceleration” (9.8 m/s²).
• La: “Launched object? Horizontally Launches continue a straight path.”
• Te: Terrestrial motion: “Think Terrestrial for projectile motion - a combo of horizontal and vertical motion.”

Kepler’s Laws

Tip: Think “Planetary Elliptical Paths.”

• Plan: “Objects move in an elliptical Path with the Sun at 1 Focus.”
• ET (ExtraTerrestrial): “ET loves outer space- he knows a planet’s orbital period increases with semi-major axis cubed.”
• In verse: “Inversely proportional: speed gets lower when the semi-major axis’ square root is higher.”

Centripetal Forces- Gravitation

Tip: Remember that centripetal force and gravity deal with curved motion and forces of attraction.

• CenTrifugal or CenTripetal ?: Remember these terms always go in opposite directions.
• GraViTational Pulls: Imagine a big V for gravitational:

>V< is the Gravitational Pull!