Joule second is the unit of

The unit is called the Joule second (J·s), and it’s used to describe angular momentum-a concept in rotational motion. The rotational equivalent of linear momentum, angular momentum is a measure dependent on the body’s rotational inertia and its angular velocity. Stated another way, it gives a measure of how much motion an object possesses and how it’s distributed around the axis of rotation.

Angular momentum is applied to describe motion systems in the physical world, including spinning objects, rotating planets, and even quantum systems. In this case, the unit would be Joule second because it involves quantities like torque and time, which together reflect aspects of energy and motion in rotational contexts.

All the other quantities of the given choices are measured in totally different units. Linear momentum is measured in kilogram meter per second, work is measured in Joules, and pressure is measured in Pascal. The units also fit with the physical definitions and the mathematical formulation of the quantities concerned.

Accordingly, in the following set of choices, angular momentum would be measured in Joule seconds, presenting the uniqueness with respect to quantities for rotational motion study.

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