Rotation Problem

1. Mar 13, 2013

KTiaam

1. The problem statement, all variables and given/known data
A merry - go - round rotates clockwise 15 times in 45 seconds. By rubbing against its edge, a child stop it from turning in 15 seconds.

a) find its initial angular velocity (ω)
b) find its angular acceleration ($\alpha$)

3. The attempt at a solution

15 times in 45 seconds means:

in 1 second it makes 1/3 of a revolution

thus in 3 seconds it make on complete revolution

im not sure if im going in the right direction but Angular Velocity is in radians per second.

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Mar 13, 2013

TSny

You found that it makes 1/3 revolution per second. Can you convert 1/3 revolution to radians?

3. Mar 13, 2013