Free Fall from Rest
Estimate fall time and impact speed from a release height.
Your numbers
Fall time
Released from rest in uniform gravity, without drag. Not a fall-safety assessment.
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Formula
Use t = √(2h/g) and v = √(2gh). h is release height in m and g is gravity in m/s². Time t is in s and speed v is in m/s, starting from rest without air resistance.
Estimate fall time and impact speed from a release height.
Worked example
- Release height (m)
- 20
- Gravity (m/s²)
- 9.80665
- Fall time
- 2.0196199771 s
- Impact speed magnitude
- 19.8057062485 m/s
Scope and limitations
Released from rest in uniform gravity, without drag. Not a fall-safety assessment.
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Formula version: 6fc6d19d02a5 · Example checked: