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September 21, 2014

September 21, 2014

Posted by **HELP!!!!** on Saturday, March 26, 2011 at 3:59pm.

(a) Find the angular acceleration.

(b) Find the net torque required.

(c) Find the angle turned through in 27 s.

(d) Find the work done by the net torque.

(e) Find the kinetic energy of the turbine at the end of the 27 s.

- physics -
**Damon**, Saturday, March 26, 2011 at 4:07pmYou should not have to ask this question. I am sure exactly how to do it is in your text book.

(a) alpha = change in speed (140)/change in time (27)

(b) Torque = I alpha = 23 * alpha

(c) A = 0 + 0 t + (1/2) alpha t^2

(d)and (e) work done = change in kinetic energy

= (1/2) I w^2

where w = alpha t = 27 alpha

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