Friday

December 19, 2014

December 19, 2014

Posted by **Gaurav** on Thursday, January 26, 2012 at 5:00am.

- physics -
**drwls**, Thursday, January 26, 2012 at 6:32amI assume they want the angular velocity in radians/sec units.

After 5 revolutions, the angle turned is

A = 10 pi radians

The angular acceleration rate is

alpha = 4 pi radians/s^2

The time since starting is given by

A = (1/2)*alpha*t^2

t^2 = 2A/alpha = 5 sec^2

t = 2.236 s

w(at t = 2.236 s) = alpha*t = 28.1 rad/s

**Answer this Question**

**Related Questions**

Physics - A wheel starts rotating from rest with uniform angular acceleration....

science- physics - A rotating wheel requires 4.17 s to rotate through 37 rev. ...

physics - A 1.80 m radius playground merry-go-round has a mass of 120 kg and is ...

Physics - A gymnast is performing a floor routine. In a tumbling run she spins ...

Physics - A spinning disk of mass 5.0 kg and radius 0.25m is rotating about an ...

physics - A spinning disk of mass 5.0 kg and radius 0.25m is rotating about an ...

physics - drwls? - A disk rotates about its central axis starting from rest and ...

physics - A 1.80 m radius playground merry-go-round has a mass of 120 kg and is ...

physics - A 1.80 m radius playground merry-go-round has a mass of 120 kg and is ...

physics - A 1.80 m radius playground merry-go-round has a mass of 120 kg and is ...