jalga sekundruudu kohta (tähis ft∙s⁻²) on kiirenduse ühik, mis väljendab kiiruse muutust (ühikutes jalga sekundis ehk ft/s) jagatuna ajaga sekundites (s). Rahvusvahelises mõõtühikute süsteemis (SI) vastab sellele ühikule meeter sekundis ruudus.
The foot per second squared (symbol ft∙s-2) is a unit of acceleration, and it expresses change in velocity expressed in units of feet per second (ft/s) divided by time in seconds (s). The corresponding unit in the International System of Units (SI) is the metre per second squared.
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