# Homework Help: Space Station Design

1. Jun 4, 2009

### PrideofPhilly

1. The problem statement, all variables and given/known data

Part 1:

You want to design a large, permanent space station so that no artificial gravity is necessary. You decide to shape it like a large coffee can of radius 322 m and rotate it about its central axis. The acceleration of gravity is 9.8 m/s2. What rotation speed would be required to simulate gravity?

Part 2:

If an astronaut jogged in the direction of the rotation at 5 m/s, what is the simulated gravitational acceleration the astronaut would feel?

2. Relevant equations

a = v^2/r

ω = v/r

a = vω

3. The attempt at a solution

For Part 1:
9.8 = v^2/322 m
v^2 = 3155.6
v = 56.17472741 m/s

vω = v^2/r
ω = v/r
ω = (56.17472741 m/s)/(322 m)

For Part 2:

v = rω

I don't really know where to begin for this part.
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Jun 4, 2009

### LowlyPion

a = v2/r = ω2r = g

ω = (g/r)1/2

In part 2 they want you to determine what happens when Kier Dullea (astronaut from 2001:Space Odyssey) is jogging, thereby increasing his speed (and the g force) by 5 m/s in the direction of rotation.

3. Jun 4, 2009

### PrideofPhilly

Oh...okay, so:

astronaut's speed: 56.17472741 m/s + 5 m/s

a = v^2/r
a = (61.17472741 m/s)^2/322 m = 11.62223624 m/s^2

4. Jun 4, 2009

### LowlyPion

Pretty much.

Since 9.8 is the given precision of gravity, maybe the correct form of your answer would be 11.6, depending on your instructor.