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An Ultracentrifuge accelerates from rest to 90000 rpm in 1.90min.
a) What's the angular acceleration in rad/s^2?
b) Wbat the tangencial acceleration at a point 8.2cm from the rotational axis?
c) What's the radial acceleration in m/s^2 to rpm completed at the same point in the last part?
na utacentrilfuga acelera desde el reposo hasta 90000 rpm en 1.90 min. (10 puntos) a) ¿Cuál
es su aceleración angular en rad/s b) ¿Cuál es la aceleración tangencial c) de un punto a
8.20 cm del eje de rotación? n m/s2 arm completas en el mismo punto que la parte anterior?
¿Cuál es la aceleración radial e d) dl es la aceleración radial en muiltiplos de g de este
punto a rpm compietas?
Solution
here,
final angular , w = 90000 rpm
w = 9420 rad/s
time taken , t = 1.9 min = 114 s
a)
let the angular accelration be alpha
w = w0 + alpha * t
9420 = 0 + alpha * 114
solving for alpha
alpha = 82.6 rad/s^2
b)
r = 8.2 cm = 0.082 m
the tangential accelration , a = alpha * r
a = 6.78 m/s^2
c)
the radial accelration , ar = w^2 * r
ar = 9420^2 * 0.082 m/s^2
ar = 7.3 * 10^6 m/s^2
d)
the radial acceleration in multiples of g at this point to rmp completed , a = ar /g
a = 7.42 * 10^5 g

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An Ultracentrifuge accelerates from rest to 90000 rpm in 1-90min- a) W.docx

  • 1. An Ultracentrifuge accelerates from rest to 90000 rpm in 1.90min. a) What's the angular acceleration in rad/s^2? b) Wbat the tangencial acceleration at a point 8.2cm from the rotational axis? c) What's the radial acceleration in m/s^2 to rpm completed at the same point in the last part? na utacentrilfuga acelera desde el reposo hasta 90000 rpm en 1.90 min. (10 puntos) a) ¿Cuál es su aceleración angular en rad/s b) ¿Cuál es la aceleración tangencial c) de un punto a 8.20 cm del eje de rotación? n m/s2 arm completas en el mismo punto que la parte anterior? ¿Cuál es la aceleración radial e d) dl es la aceleración radial en muiltiplos de g de este punto a rpm compietas? Solution here, final angular , w = 90000 rpm w = 9420 rad/s time taken , t = 1.9 min = 114 s a) let the angular accelration be alpha w = w0 + alpha * t 9420 = 0 + alpha * 114 solving for alpha alpha = 82.6 rad/s^2
  • 2. b) r = 8.2 cm = 0.082 m the tangential accelration , a = alpha * r a = 6.78 m/s^2 c) the radial accelration , ar = w^2 * r ar = 9420^2 * 0.082 m/s^2 ar = 7.3 * 10^6 m/s^2 d) the radial acceleration in multiples of g at this point to rmp completed , a = ar /g a = 7.42 * 10^5 g