Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 40.0 s to speed up from rest to its top speed of 1 rotation every 1.20 s. The astronaut is strapped into a seat 4.10 m from the axis.

astronauts are subject to an acceleration of 11.5g

Explanation:

To calculate centripetal acceleration, we must find the linear velocity of astronauts

V = d / t

Let us use the revolution as distance and, in this case, the time is denominate period

V = 2π r / T

V = 2π 4.1 / 1.2

V = 21.5 m / s

The centripetal acceleration equation is

a = v2 / r

a = 21.52 / 4.1

a = 112.4 m / s

The acceleration can be written based on the acceleration of gravity

a2 = a / g

a2 = 112.4 / 9.8

a2 = 11.5g

It is said that astronauts are subject to an acceleration of 11.5g