Problem:(adsbygoogle = window.adsbygoogle || []).push({});

A large fish strikes bait cast by a fisherman with a rod

and reel. The fish creates tension in the line of 65 N.

How many revolutions of the reel occur in 1.0 s if the

reel has a moment of inertia of 4.0 * 10^-3 kg-m2 and the

radial distance of the line from the reel’s axis is 4.0

cm? Assume the reel has negligible friction.

Solution:

calculated Torque from tension force: 65N*.04m = 2.6

ƩTorque = I*(angular Acceleration)

2.6/ ( 4.0 10^-3) = angular Acceleration = 650

(650)*(1sec) = Angular Velocity = 650 rad/sec * rev/(2pi) = 103 rev/sec.

What am I doing wrong? the answer is 52 rev

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# Determing Revolutions

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