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warfreak131
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Give the magnitude of the magnetic field that will.......
Suppose the rod in the figure has mass m = 0.38 kg and length 26 cm and the current through it is I = 40 A.
If the coefficient of static friction is us = 0.49, determine the minimum magnetic field B (not necessarily vertical) that will just cause the rod to slide. Give the magnitude of B.
Express your answer using two significant digits.
F = IBd
F = usFN
Since its just "just beginning to move", I know that the two forces are equal to eachother.
So:
IBd = usFN
IBd = usmg
which means that:
B = (usmg) / Id
I plug in the values (after converting them to standard SI units), and I get .175 T. To two significant figures would be .18. But thats not right, I also tried .17, not that either, .2 was also wrong. I don't know what I'm doing wrong.
Homework Statement
Suppose the rod in the figure has mass m = 0.38 kg and length 26 cm and the current through it is I = 40 A.
If the coefficient of static friction is us = 0.49, determine the minimum magnetic field B (not necessarily vertical) that will just cause the rod to slide. Give the magnitude of B.
Express your answer using two significant digits.
Homework Equations
F = IBd
F = usFN
The Attempt at a Solution
Since its just "just beginning to move", I know that the two forces are equal to eachother.
So:
IBd = usFN
IBd = usmg
which means that:
B = (usmg) / Id
I plug in the values (after converting them to standard SI units), and I get .175 T. To two significant figures would be .18. But thats not right, I also tried .17, not that either, .2 was also wrong. I don't know what I'm doing wrong.