Purchase Solution

# The solution to Rotational Motion

Not what you're looking for?

A 62.99 kg woman stands at the rim of a horizontal turntable having a moment of inertia of 495 kg·m^2 and a radius of 2.00 m. The turntable is initially at rest and is free to rotate about a frictionless, vertical axle through its center. The woman then starts walking around the rim clockwise (as viewed from above the system) at a constant speed of 1.50 m/s relative to the Earth.

(a) In what direction (clockwise or counterclockwise) and with what angular speed (in rad/s) does the turntable rotate?

(b) How much work (in joules) does the woman do to set herself and the turntable in motion?

##### Solution Summary

This solution provides a step by step explanation of the given physics problem.

##### Solution Preview

See attached for diagram

a) The woman and turntable form an isolated system, as there is no external torque being applied on it. Hence, by the law of conservation of angular momentum, the net angular momentum of the system must remain constant. As the woman and the turntable are initially at rest, the initial net angular momentum of the system is ...

##### Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

##### Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

##### Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

##### The Moon

Test your knowledge of moon phases and movement.