4) A 3 m long light cord is wrapped around a uniform cylindrical spool of radius 0.5 m and mass 6 kg. The spool is mounted on an axle that has some friction. The friction in the axel produces a constant torque of 0.5 Nm. The spool is initially at rest. The cord is pulled with a constant force of 15 N until all the cord unwraps from the spool. (a) Find the rotational speed of the spool when the last bit of cord unwraps from the spool. (b) Through how many revolutions will the spool rotate between the cord coming unwrapped and coming to rest.
4) A 3 m long light cord is wrapped around a uniform cylindrical spool of radius 0.5 m and mass 6 kg. The spool is mounted on an axle that has some friction. The friction in the axel produces a constant torque of 0.5 Nm. The spool is initially at rest. The cord is pulled with a constant force of 15 N until all the cord unwraps from the spool. (a) Find the rotational speed of the spool when the last bit of cord unwraps from the spool. (b) Through how many revolutions will the spool rotate between the cord coming unwrapped and coming to rest.
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Transcribed Image Text:4) A 3 m long light cord is wrapped around a uniform cylindrical spool of radius 0.5 m and mass 6 kg. The
spool is mounted on an axle that has some friction. The friction in the axel produces a constant torque of
0.5 Nm. The spool is initially at rest. The cord is pulled with a constant force of 15 N until all the cord
unwraps from the spool.
(a) Find the rotational speed of the spool when the last bit of cord unwraps from the spool.
(b) Through how many revolutions will the spool rotate between the cord coming unwrapped and
coming to rest.
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