- #1
crybllrd
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Homework Statement
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 10m and, in starting, rotates [tex]\theta[/tex]=0.30t[tex]^{2}[/tex], there t is in seconds and [tex]\theta[/tex] in radians. When t=5.0s, what are the magnitudes of the astronaut's (a) angular velocity, (b) linear velocity, (c) tangential acceleration, and (d) radial acceleration?
Homework Equations
Kinematics equations
The Attempt at a Solution
For (a), I used [tex]\theta[/tex]=.30(5)[tex]^{2}[/tex]=7.5rad, plugging in 5.0s for t. Then knowing initial angular velocity = 0, time = 5s, and now [tex]\theta[/tex]=7.5rad, I used a kinematics equation to determine final angular velocity to be 3rad/s.
Part (b) is where I'm stuck. I was thinking to convert 3 rad/s to degrees, then divide by 360 degrees to get 4.7 rotations a second, but not sure where to go from there (or if I'm on the right track).