# Problem 4-62 Centripetal acceleration - Part B2 - A

An astronaut in training is spinning around in a device that rotates at 30 revolutions per minute. (a) If the astronaut is $7.5\; m$ from the centre of the device, what is the magnitude of the centripetal acceleration? (b) Express the answer in terms of "$g,$" the magnitude of the acceleration due to gravity.
[Ans. (a) $74\; m/s^2$   (b) $7.6\; g$]

Accumulated Solution

The expression for centripetal acceleration is:  $a_c = 4\pi ^2r/T^2$

Correct!

In this problem the time for one revolution (the Period) is:

(A)   $30\; min$

(B)   $30\; s$

(C)   $2 \;s$