Question

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A spaceman in training is rotated in a seat at the end of a horizontal arm of length 5 m. if he can withstand acceleration upto 9 g then what is the maximum number of revolution per second permissible?

1) 13.5 rev/s
2)1.35 rev/s
3)0.675 rev/s
4)6.75 rev/s

Answer 1

Answer:

2)

Explanation:

Let the maximum number of revolutions per sec be ω

Radius (r)= length of arm =5m

He can withstand a acceleration upto 9m/s^2

Therefore ω²r=9

ω=√9/5 = 1.35 rev/s

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