From the same height, an object released from rest takes about 2.5 times as long to fall on the Moon as on Earth in a simplified vacuum calculation. For a one-meter drop, the times are approximately 1.11 seconds on the Moon and 0.45 seconds on Earth.
Why the Moon changes the fall time
Near Earth’s surface, gravity accelerates an object downward at about 9.81 meters per second squared. Near the Moon’s surface it is about 1.62 meters per second squared. Weaker acceleration means an object gathers downward speed more slowly after it is released.
A side-by-side one-meter example
- Earth: distance 1 meter; acceleration approximately 9.81 m/s²; fall time approximately 0.45 second.
- Moon: distance 1 meter; acceleration approximately 1.62 m/s²; fall time approximately 1.11 seconds.
- Comparison: the Moon fall takes roughly 2.46 times as long in this idealized setup.
The simple calculation
For an object starting from rest with constant acceleration, the distance fallen is one-half times gravity times time squared. Rearranging gives time = square root of (2 × height ÷ gravity). Put the same height into both calculations; only the gravity value changes.
This model treats the drop as happening near the surface, assumes an initial downward speed of zero, and ignores air drag. It is a useful comparison, not a complete simulation of every real-world fall.
What about a ball and feather?
On the nearly airless Moon, a hammer and feather can fall together from the same height, because they experience the same gravitational acceleration regardless of mass when air resistance is negligible. On Earth, air drag makes a feather descend much more slowly than a compact metal object.
Does the object weigh less?
Yes. Its weight—gravitational force—is smaller on the Moon, while its mass is unchanged. That difference explains both the slower acceleration of falling objects and why an astronaut can feel lighter while still having substantial inertia.
FAQ
Would a drop from two meters take twice as long?
No. With constant gravity and a release from rest, time increases with the square root of height. Doubling height multiplies fall time by approximately 1.41.
Do heavier objects fall faster on the Moon?
Not in the idealized no-air-resistance comparison. Mass alone does not give them a greater downward acceleration.
Could you safely drop objects as an experiment on the Moon?
Only in a properly designed mission setting. Loose objects can damage equipment, and there are no ordinary home conditions that reproduce lunar gravity.
Related guides
Continue with Wondelique’s hammer-and-feather explanation and why lunar gravity is weaker.
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