Approximate a fishing reel to be two solid disks, each of radius 4.8 cm and combined mass 0.87 kg which can rotate without friction. String (of negligible mass) is wrapped around the reel (between the disks) all the way to its edge (see Fig la). The fishing line is strung with bait and left at rest in the water. A fish then suddenly takes the bait and applies a constant force of 2.4 N on the fishing line, pulling the reel counterclockwise. Fig la Fig 1b (a) What is the angular acceleration of the fishing reel? rad/s? (b) Immediately after taking the bait, how much fishing line does the fish pull from the reel in 0.35 s? (Assume this time interval is short enough that radius of the fishing line wrapped around the reel does not appreciably change during it.) line pulled off = cm (c) Suppose instead this fisherman had cast his bait much further out, so that the fishing line left on the reel was only halfway out to the edge (see Fig 1b). If all other givens are the same, re-answer parts a & b. à = rad/s?
Approximate a fishing reel to be two solid disks, each of radius 4.8 cm and combined mass 0.87 kg which can rotate without friction. String (of negligible mass) is wrapped around the reel (between the disks) all the way to its edge (see Fig la). The fishing line is strung with bait and left at rest in the water. A fish then suddenly takes the bait and applies a constant force of 2.4 N on the fishing line, pulling the reel counterclockwise. Fig la Fig 1b (a) What is the angular acceleration of the fishing reel? rad/s? (b) Immediately after taking the bait, how much fishing line does the fish pull from the reel in 0.35 s? (Assume this time interval is short enough that radius of the fishing line wrapped around the reel does not appreciably change during it.) line pulled off = cm (c) Suppose instead this fisherman had cast his bait much further out, so that the fishing line left on the reel was only halfway out to the edge (see Fig 1b). If all other givens are the same, re-answer parts a & b. à = rad/s?
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Chapter11: Angular Momentum
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need help on both (: but if u cant answer both.... the first problem about the fishing reel will be fine!
Thnak you for your help
Transcribed Image Text:On the Wheel of Fortune game show, a solid wheel (of radius 7 m and mass 10 kg) is given an initial counterclockwise angular velocity of
+1.14 rad/s. It then smoothly slows down and stops after rotating through 3/4 of a turn.
(a) Find the frictional torque that acts to stop the wheel.
N. m
Transcribed Image Text:Approximate a fishing reel to be two solid disks, each of radius 4.8 cm and combined mass 0.87 kg which can rotate without friction.
String (of negligible mass) is wrapped around the reel (between the disks) all the way to its edge (see Fig la). The fishing line is strung
with bait and left at rest in the water. A fish then suddenly takes the bait and applies a constant force of 2.4 N on the fishing line, pulling
the reel counterclockwise.
Fig la
Fig 1b
(a) What is the angular acceleration of the fishing reel?
rad/s?
%3D
(b) Immediately after taking the bait, how much fishing line does the fish pull from the reel in 0.35 s?
(Assume this time interval is short enough that radius of the fishing line wrapped around the reel does not appreciably change
during it.)
line pulled off =
cm
(c) Suppose instead this fisherman had cast his bait much further out, so that the fishing line left on the reel was only halfway
out to the edge (see Fig 1b). If all other givens are the same, re-answer parts a & b.
=
rad/s?
18
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