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The impulse encountered by an object can be calculated from the force (F) that was exerted on it and the time (t) over which the force was exerted. The formula is
Impulse = F • t
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The standard metric units of a quantity can be understood by thinking about its formula. Impulse is the product of force and time (see Formula Frenzy section). So the units on impulse are units of force multiplied by units of time. The standard metric unit of force is the Newton; the standard metric unit of time is the second. So the standard metric unit of impulse is Newton • second.
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