Finding the minimum radius

1. Jan 29, 2008

mortho

1. The problem statement, all variables and given/known data
An airplane is flying in a horizontal circle at a speed of 100 m/s. The 88.0 kg pilot does not want his centripetal acceleration to exceed 7.00 times free-fall acceleration.
a) What is the minimum radius of the circular path?

2. Relevant equations
v=eπr/t

a=v2/t
3. The attempt at a solution

So i figured out the time using the acceleration equation which was 68.67=100squred/t and for t i got 145.6 s. Then i used that time to solve for radius and got 2318 m which was wrong. The only thing i could think of that i did wrong was something mathematical. Help Please!:)

2. Jan 29, 2008

hage567

Change the t to an r like we talked about in your other thread and you should be OK.

3. Jan 29, 2008

mortho

so ..145.6 m ?

4. Jan 29, 2008

hage567

Looks good to me.

5. Jan 29, 2008

mortho

Thanks!

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