Question

A cylindrical fishing reel has a mass of 1.29 kg
and a radius of 3.41 cm. A friction clutch
in the reel exerts a restraining torque of
1.11 N · m if a fish pulls on the line. The fisherman gets a bite, and the reel begins to spin
with an angular acceleration of 56.4 rad/(s^2)
.
What force does the fish exert on the line?
Answer in units of N.

Answer 1

$$FR-\tau_f=I\alpha=0.5MR^2\alpha$$

$$F(0.0341)-1.11=0.5(1.29)(0.0341)^2(56.4)$$

$$F=33.8\ N$$