The head of a grass string trimmer has 100 g of cord wound in a light, cylindrical spool with inside diameter 3.00 cm and outside diameter 18.0 cm as shown in the figure below. The cord has a linear density of 10.0 g/m. A single strand of the cord extends 16.0 cm from the outer edge of the spool.

http://www.webassign.net/pse/p10-50.gif

(a) When switched on, the trimmer speeds up from 0 to 2 300 rev/min in 0.210 s. What average power is delivered to the head by the trimmer motor while it is accelerating?

Question

The head of a grass string trimmer has 100 g of cord wound in a light, cylindrical spool with inside diameter 3.00 cm and outside diameter 18.0 cm as shown in the figure below. The cord has a linear density of 10.0 g/m. A single strand of the cord extends 16.0 cm from the outer edge of the spool.

http://www.webassign.net/pse/p10-50.gif

(a) When switched on, the trimmer speeds up from 0 to 2 300 rev/min in 0.210 s. What average power is delivered to the head by the trimmer motor while it is accelerating?

anonymous · Answer

please explain your work :)