# Angular Motion and Newton's Second Law

At t=0, a wheel rotating about a fixed axis at a constant angular acceleration has an angular velocity of 2 rad/s. Two seconds later it has turned 5 complete revolutions. What is the angular acceleration of this wheel?

==============================================

Answer:

a) 17 rad/s^2

b) 14 rad/s^2

c) 20 rad/s^2

d) 23 rad/s^2

#################################################

A 9.00 kg hanging weight is connected to a string over a pulley to a 5.00 kg block that is sliding on a flat table. If the coefficient of kinetic friction is 0.15, find the tension in the string.

=============================================

Answer:

a) 28.3 N

b) 36.2 N

c) 40.4 N

d) 53.4 N

================================================

OTA: Please take this problem only if you can show step by step problem solving and equations used. Thank you.

https://brainmass.com/physics/velocity/angular-motion-newtons-second-law-23295

#### Solution Preview

Hello and thank you for posting your question to Brainmass!

The solution is ...

#### Solution Summary

The 3-pages solution provides a step-by-step explanations and full derivations how to solve these two problems