PBS
Will the Universe Expand Forever?
Throughout history, there has been much speculation about what the fate of the universe would be. Many theorized that the universe would eventually succumb to the pull of gravity, and reverse its expansion in what was being called ‘The...
Curated Video
Universal Law of Gravitation
Universal Law of Gravitation explores Newton’s Universal Law of Gravitation by defining and providing examples.
Flipping Physics
How Much is a Mermaid Attracted to a Doughnut?
How Much is a Mermaid Attracted to a Doughnut? A practical, everyday example of Newton’s Universal Law of Gravitation.
Flipping Physics
The Force of Gravitational Attraction between the Earth and the Moon
According to NASA, the mass of the Earth is 5.97 x 10^24 kg, the mass of the Moon is 7.3 x 10^22 kg, and the mean distance between the Earth and the Moon is 3.84 x 10^8 m. What is the force of gravitational attraction between the Earth...
Flipping Physics
Altitude of Geostationary Orbit (a special case of Geosynchronous Orbit)
Calculate the altitude of a satellite in geostationary orbit which is an orbit with the same 24 hour period as the Earth and always located directly over the same location on the equator. Geostationary orbit is a special case of...
Flipping Physics
Newton's Universal Law of Gravitation Introduction (The Big G Equation)
Understanding Newton’s Universal Law of Gravitation. Including a dramatization of The Cavendish Experiment and force visualization via qualitative examples.
Flipping Physics
Deriving the Acceleration due to Gravity on any Planet and specifically Mt. Everest
Derive the acceleration due to gravity on any planet. Find the acceleration due to gravity on Mt. Everest. And determine how much higher you could jump on the top of Mt. Everest!
Khan Academy
Khan Academy: Gravitation: Acceleration Due to Gravity at the Space Station
This video lecture will use the Universal Law of Gravitation to calculate the acceleration due to gravity at the surface of the Earth. Video will then calculate the space station's acceleration due to gravity. [10:12]
Khan Academy
Khan Academy: Introduction to Newton's Law of Gravitation
Sal Khan introduces us to Newton's Law of Gravitation in this video. [8:37]
Khan Academy
Khan Academy: Deriving Displacement as Function of Time, Accel, Initial Velocity
Sal Khan discusses deriving displacement as a function of time, constant acceleration, and initial velocity in this video. [9:57]
Khan Academy
Khan Academy: Why Gravity Gets So Strong Near Dense Objects
Sal Khan uses two examples to explain why a smaller denser object of the same mass can exert a stronger gravitational pull. [8:13]