# A turntable (disk) of radius 26.0 cm and rotational inertia 0.400 kg.m^2 rotates with an angular...

## Question:

A turntable (disk) of radius 26.0 cm and rotational inertia {eq}\rm 0.400 \ kg \cdot m^2 {/eq} rotates with an angular speed of 3.00 rad/s around a frictionless, vertical axle. A wad of clay of mass m = 0.250 kg drops onto and sticks to the edge of the turntable. What is the new angular speed of the turntable?

## Angular Momentum:

Angular momentum is the product of an object's moment of inertia and its angular velocity. It gives us an idea of how difficult it is to stop an already rotating object. Angular momentum is conserved in scenarios where no external torques act on the system.

## Answer and Explanation:

The new angular velocity of the system is 2.88 rad/s.

Angular momentum is conserved since no external torques are acting.

*L*is angular momentum.*I*i...

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from UExcel Physics: Study Guide & Test Prep

Chapter 7 / Lesson 11