- #1
vipertongn
- 98
- 0
A centrifuge in a medical laboratory rotates at an angular speed of 3400 rev/min. When switched off, it rotates 48.0 times before coming to rest. Find the constant angular acceleration of the centrifuge.
Relevent equations: ωf = ωi + αt
My work:
I found out the time by (48 rev)(1min/3400 rev)(60 sec/min) = 0.847 seconds
I then converted the rev/min to rad/sec (3400 rev/min)(2pi/1rev)(1min/60sec)= 356 rad/sec
So I set the problem up like 0=356 rad/sec + α(0.847 seconds)
-356/0.847=α
α = -420 rad/s^2
Relevent equations: ωf = ωi + αt
My work:
I found out the time by (48 rev)(1min/3400 rev)(60 sec/min) = 0.847 seconds
I then converted the rev/min to rad/sec (3400 rev/min)(2pi/1rev)(1min/60sec)= 356 rad/sec
So I set the problem up like 0=356 rad/sec + α(0.847 seconds)
-356/0.847=α
α = -420 rad/s^2