The Rope Puzzle
Watch the animation — then make your guess
↺ Replay
Table
r ≈ 0.5 m
gap Δr =
?
cm
Earth
r ≈ 6 400 km
gap Δr =
?
cm
✓ Same gap for both — the radius cancels out of the formula
🪑 Table gap is bigger
⚖️ Same gap
🌍 Earth gap is bigger
Extra rope added Δ
C
1.00
m
0
1 m
2 m
3 m
π m
4 m
5 m
2π m