Centripetal Force Lab: Converting Linear Speed to Radians/sec

[physks4dumies]

we did a lab in physics recently in which we whirled a rubber stopper at a given radius (1 meter) for 30 rev and timed it. below, are the values we got. i' not sure if i am converting the linear peed to radians/sec correctly. any input?

Centripetal Force Period for 30 revolutions Period=T Speed= C/T Speed (radians/sec)
5 30 s 6 s 1.05 m/s 120pi
10 23.62 s 2.36 s 2.66 m/s 94.5pi
15 19.78 s 1.32 s 4.76 m/s 79pi
20 16.85 s .84 s 7.48 m/s 66.3pi
25 15.72 s .63 s 9.98 m/s 63pi

 

[member 553083]

Yes, you are converting the linear speed to radians/sec correctly. To convert from linear speed to angular speed, you need to multiply it by 2π/r, where r is the radius of the circle.