A spaceman in training is rotated in a seat at the end of a horizontal arm of length 5m. If he can withstand acceleration upto 9 g then what is the maximum number of revolutions per second permissible ? (Take g = 10 m/s 2 )
Text Solution
Verified by ExpertsThe correct answer is:
C
In circular motion, necessary centripetal force to the man is provided by effective weight of man. Thus,
m × 9g = mrω 2 = mr × 4π 2 n 2
or n = 
Given, r = 5m
∴ n = 
= 0.675 rev/s
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