- #1
premedonna89
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Homework Statement
A fish takes the bait and pulls on the line with a force of 1.8 N. The fishing reel, which rotates counterclockwise without friction, is a solid cylinder of radius 0.064 m and mass 0.80 kg.
(a) What is the angular acceleration vector of the fishing reel?
rad/s2
(b) How much line does the fish pull from the reel in 0.17 s?
m
Homework Equations
Torque = Inertia x angular acceleration
Inertia = 1/2 x Mass x Radius^2 (for solid cylinders/discs)
Angular Acceleration = acceleration/radius (I personally didn't think this was necessary, but then again I didn't get the right answer)
The Attempt at a Solution
I simply calculated Inertia by:
1/2 x 0.8 kg x (0.064 m)^2 = 1.6384 x 10^-3
Then I tried to calculate angular acceleration by:
1.8 N / (1.6384 x 10^-3) = 1098.63 rad/sec ^2
I was told by WebAssign that this was incorrect...so I entered it as a negative value (-1098.63) in case I was confused regarding the counterclockwise direction of the reel, but this was also considered incorrect.
I have not attempted part B yet because my approach for part B would involve knowing the angular acceleration.
Please help!