Question
A 18 cm -diameter circular saw blade has a mass of 0.90 kg , distributed uniformly...
A 18 cm -diameter circular saw blade has a mass of 0.90 kg , distributed uniformly as in a disk.
a.)
What is its rotational kinetic energy at 3400 rpm ?
Express your answer using two significant figures.
b.)
What average power must be applied to bring the blade from rest to 3400 rpm in 3.5 s ?
Express your answer using two significant figures.
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