this is about torque,,,A magnetic tape is being played on a cassette disk. the tension in the tape applies a torque to the supply reel. assuming the tension remains constant during playback, discuss how this torque varies as the reel becomes empty.
2007-08-29 22:05:32 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Torque = Force * moment arm
For your problem about the magnetic tape, the tension applied is the force while the radius of the reel is the moment arm.
If the tension remains constant (force is constant), and the reel becomes empty (which means that the moment arm decreases), then it follows that the torque correspondingly decreases.
hope this helps!! =)
2007-08-29 22:55:18 · answer #1 · answered by kim 2 · 2⤊ 0⤋
The top three answers are all correct, the torque decreases as the radius decreases (as the reel gets emptier).
However, I think that this applies more to the receiver reel than to the supply reel. The supply reel is just kind of free-wheelin', I think. The torque could be used to calculate the power requirements for the motor, for example
Good Luck
2007-08-29 23:06:39 · answer #2 · answered by Mugwump 7 · 1⤊ 0⤋
If the tension is constant, as the torque is the product of the force/tension by the radius, the torque decreases (or increases) like the radius.
2007-08-29 22:27:32 · answer #3 · answered by Scanie 5 · 0⤊ 1⤋
Torque is force times the radius (or moment arm). As the supply reel empties the radius decreases.
2007-08-29 22:13:25 · answer #4 · answered by jsardi56 7 · 0⤊ 2⤋
Fk = µk N so... eighty.0 = .30 N divide the two facets by way of .30 and N = 266.6667 to locate the mass: N = mg (mass x gravity) g is exceptionally much 10 so..... The mass is 26.6667 however the load is 266.6667
2016-10-03 09:58:13 · answer #5 · answered by ? 4 · 0⤊ 0⤋