• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Centriptial Accleration

  • Thread starter Nb
  • Start date

Nb

A centrifuge is used for training astronauts to withstand large accelerations. It consists of a chamber (in which the astronaut sits) that is fixed to the end of a long horizontal and rigid pole. The arrangement is rotated about an axis perpendicular to the pole’s free end. Such a centrifuge starts from rest and has an angular acceleration of 0.25 rad/s2. The chamber is 3.0 m from the axis of rotation. Through what angle has the device rotated when the centripetal acceleration experienced by an astronaut in the chamber is four times the acceleration due to the earth’s gravity?


i know that the angle= tan^-1 (a/w) to calculate a is a=(ac^2+at^2)^(1/2) but from this point i don't know what to do .
 

jamesrc

Science Advisor
Gold Member
476
1
I may be over-simplifying here, but doesn't the problem only ask you to consider the centripetal acceleration? If so, I think the tangential acceleration is irrelevant; simply set rω^2 = 4g and then find the angle this occurs at due to the constant acceleration, α of the centrifuge (Δ(ω^2;) = 2*α*Δθ).
 

Related Threads for: Centriptial Accleration

  • Posted
Replies
3
Views
10K
  • Posted
Replies
5
Views
1K
  • Posted
Replies
1
Views
2K
  • Posted
Replies
1
Views
3K
  • Posted
Replies
3
Views
1K
  • Posted
Replies
2
Views
2K
  • Posted
Replies
2
Views
2K
  • Posted
Replies
3
Views
1K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top