Calculate the centripetal acceleration of a point 7.50 cm from the axis of an ultracentrifuge spinning at 7.5 x 10⁴ rev/min. Determine the ratio of this acceleration to that due to gravity. See Figure 6.8(b).

Strategy
The term rev/min stands for revolutions per minute. By converting this to radians per second, we obtain the angular velocity ω. Because is given, we can use the second expression in the equation to calculate the centripetal acceleration.

Transcribed Image Text:

m ac D V 3 Center of rotation