What’s on the Gravitation poster
The rule, 3 worked examples, and the mistake everyone makes.
- The gravitational force between two masses is proportional to their product and inver…
- F = GMm/r² · g = GM/r² · T² ∝ r³
- Double the separation = Force falls to 1/4
- Orbital speed = v = √(GM/r)
- Kepler's third law = T² = 4π²r³/GM
- Common mistake: Measuring r from the surface → From the centre of mass
Gravitational potential is negative and zero at infinity. Escape velocity comes from setting total energy to zero.
Questions about the Gravitation poster
- What’s on the Gravitation poster?
- The rule, 3 worked examples, and the mistake everyone makes. The gravitational force between two masses is proportional to their product and inver…; F = GMm/r² · g = GM/r² · T² ∝ r³; Double the separation = Force falls to 1/4; Orbital speed = v = √(GM/r); Kepler's third law = T² = 4π²r³/GM; Common mistake: Measuring r from the surface → From the centre of mass. Gravitational potential is negative and zero at infinity. Escape velocity comes from setting total energy to zero.
- Who is the Gravitation poster for?
- Gravitation belongs to the Physics section rather than to a school year, because physical science is not something one grade owns. Anyone learning mechanics can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Gravitation poster?
- Inverse square. Double the distance and the force falls to a quarter. A wall chart earns its place by being glanceable from where the work is happening, so Gravitation belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Gravitation?
- Circular Motion, Free Body Diagrams and Friction & Drag sit alongside Gravitation in the Physics section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Circular MotionFree Body DiagramsFriction & Drag
- Is the Gravitation poster free to download and print?
- Yes. Gravitation downloads as a free PDF with no account, no email and no watermark, like everything else in the Physics section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Gravitation poster print at?
- Gravitation is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Gravitation loses nothing.Printing guide
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Charts that sit alongside Gravitation on the same wall.
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