Free Fall Time from 1500 meters - How Long to Fall?
Dropping an object from a height of 1500 meters in vacuum results in an elapsed fall time of 17.490 seconds and a terminal impact speed of 171.52 m/s (approx. 617.5 km/h or 383.7 mph).
Calculations are derived from classical Newtonian kinematics (h = ½ · g · t²) under standard Earth gravitational acceleration (g = 9.80665 m/s²).
Free Fall Drop Time & Impact Velocity
Classical Newtonian Kinematics in Vacuum (NIST Reference CODATA)
Elapsed duration for an object to reach ground in vacuum from 1500 m.
Drop Time Comparison Across Solar System (1500.0m Drop)
t ∝ 1/√gskymotion20-20).Recommended Classical Mechanics & Physics Literature
Hand-selected peer-reviewed literature, optical instruments, and mechanics resources verified by physics educator Traian Anghel.
The Feynman Lectures on Physics, Vol. 1
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Classical Mechanics by John R. Taylor
Clear, rigorous pedagogical treatment of Newton's laws, kinematics, momentum, and orbital mechanics.
Physics for Scientists and Engineers
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1500m Drop Time & Weight Across the Solar System
| Celestial Body | Surface Gravity (g) | Fall Duration (t) | Impact Velocity (km/h) | 70kg Person Weight |
|---|---|---|---|---|
Earth | 9.81 m/s² | 17.487 s | 617.6 km/h | 686.7 N (70.0 kg) |
Moon | 1.62 m/s² | 43.033 s | 251.0 km/h | 113.4 N (11.6 kg) |
Mars | 3.71 m/s² | 28.436 s | 379.8 km/h | 259.7 N (26.5 kg) |
Jupiter | 24.79 m/s² | 11.001 s | 981.8 km/h | 1735.3 N (177.0 kg) |
Venus | 8.87 m/s² | 18.391 s | 587.3 km/h | 620.9 N (63.3 kg) |
Mercury | 3.7 m/s² | 28.475 s | 379.3 km/h | 259.0 N (26.4 kg) |
Explore Other Kinematics & Motion Calculators
Frequently Asked Questions
Q1.How long does it take an object to fall 1500 meters on Earth?
In a vacuum under standard Earth gravity (g = 9.80665 m/s²), an object dropped from rest takes exactly 17.490 seconds to fall 1500 meters, calculated via t = √(2h / g).
Q2.What is the impact velocity from a 1500m drop?
At ground impact after falling 1500m, the object reaches a velocity of 171.52 m/s, which equals 617.5 km/h (383.7 mph).
Q3.How does free fall from 1500m compare on the Moon vs Jupiter?
On the Moon (g = 1.62 m/s²), falling 1500m takes 43.03 seconds. On Jupiter (g = 24.79 m/s²), the same fall takes just 11.00 seconds due to its immense gravitational acceleration.
skymotion20-20).Recommended Classical Mechanics & Physics Literature
Hand-selected peer-reviewed literature, optical instruments, and mechanics resources verified by physics educator Traian Anghel.
The Feynman Lectures on Physics, Vol. 1
By Richard Feynman, Robert Leighton & Matthew Sands. Mechanics, radiation, kinetics, and heat.
Classical Mechanics by John R. Taylor
Clear, rigorous pedagogical treatment of Newton's laws, kinematics, momentum, and orbital mechanics.
Physics for Scientists and Engineers
By Raymond A. Serway & John W. Jewett. Comprehensive kinetic energy, work, and friction mechanics.