Joule second

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For information about the unit "joule/second" see watt

The joule-second is a unit equal to a joule multiplied by a second, used to measure action or angular momentum.

[edit] Angular momentum

The angular momentum of an object is the integral with respect to time of the torque on the object. Torque in the SI system has the unit N·m, so angular momentum has the unit N·m·s, or J·s. In the informal MKS system (discussed in article entitled International System of Units), this unit is called a planck, and is about 0.7375 foot pound second (ft·lbf·s). The joule-second is the unit used for Planck's constant.