A grass trimmer for landscaping has a rotating head which consists of a spool of monofilament line, with a strand of line that extends out from the edge. The spool has an inner diameter of 3.00 cm and an outer diameter of 18.0 cm, and a mass of 100 g. The strand has a length of 16.0 cm. The monofilament line 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. When switched on, the trimmer speeds up from 0 to 2 250 rev/min in 0.230 s.
What average power is delivered to the head by the trimmer motor while it is accelerating?
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