Frequently Asked Questions
What is the formula for free fall?
From rest, height h = ½gt², time t = √(2h/g), and impact velocity v = gt, with g = 9.81 m/s².
Does air resistance matter?
Yes for long falls or light objects - this calculator ignores it (vacuum model). Real impact speeds cap at terminal velocity.
What if the object is thrown down?
Then it has an initial velocity v₀ ≠ 0. Use the acceleration calculator instead and treat g as the acceleration.
What is the difference between free fall and projectile motion?
Free fall means the object starts from rest and moves straight down under gravity alone, which is exactly what this calculator models. Projectile or thrown motion adds an initial velocity (horizontal, up, or down), splitting the path into independent horizontal and vertical parts. For a launch angle or horizontal range, use a projectile motion calculator instead.
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Estimates for informational purposes only.
Important Disclaimer: Estimates for informational purposes only.
This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.