Key Example Variation Problem $9\mathrm{.}8$

$1$ of $12$

Constants

Introduction

Be sure to review Examples $9\mathrm{.}7$ and $9\mathrm{.}8($Section $9\mathrm{.}4)$ before attempting these problems.

VP $9\mathrm{.}8\mathrm{.}1$

Part A

A solid cylinder of mass $12\mathrm{.}0$ kgkg and radius $0\mathrm{.}250$ mm is free to rotate without friction around its central axis. If you do $75\mathrm{.}0$ JJ of work on the cylinder to increase its angular speed, what will be its final angular speed if the cylinder starts from rest?

Express your answer in radians per second.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

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nothing

rad$/$srad$/$s

SubmitRequest$$Answer

Part B

What will be the cylinder's final angular speed if it is initially rotating at $12\mathrm{.}0$ rad$/$srad$/$s$?$

Express your answer in radians per second.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

$=$

nothing

rad$/$srad$/$s