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2) A uniform bar has mass 0.0120 kg and is 30.0 cm long. It pivots without friction about an axis perpendicular to the bar at point a (see figure below). The gravitational force on the bar acts in the -y direction. The bar is in a uniform magnetic field that is directed into the page and has magnitude B = 0.150 T. (a) What above the horizontal? (b) For the bar to be in rotational equilibrium, should I be in the direction from a to b or b must be the current I in the bar for the bar to be in rotational equilibrium when it is at an angle 0=30.0 degrees to a? You can use only formulas given on the formula sheets. 2 9 20 X X x Piot لى center otational equibr Tgravity gravity I mg gravity + magnetic = O in (Q) LX BX Co (0) Right ide Tt H +7 effect O ♡ >

2) A uniform bar has mass 0.0120 kg and is 30.0 cm long. It pivots without friction about an axis perpendicular to the bar at point a (see figure below). The gravitational force on the bar acts in the -y direction. The bar is in a uniform magnetic field that is directed into the page and has magnitude B = 0.150 T. (a) What above the horizontal? (b) For the bar to be in rotational equilibrium, should I be in the direction from a to b or b must be the current I in the bar for the bar to be in rotational equilibrium when it is at an angle 0=30.0 degrees to a? You can use only formulas given on the formula sheets. 2 9 20 X X x Piot لى center otational equibr Tgravity gravity I mg gravity + magnetic = O in (Q) LX BX Co (0) Right ide Tt H +7 effect O ♡ >

Principles of Physics: A Calculus-Based Text
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter22: Magnetic Forces And Magnetic Fields
Section: Chapter Questions
Problem 22P
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2) A uniform bar has mass 0.0120 kg and is 30.0 cm long. It pivots without friction about an axis perpendicular to the bar at point a (see figure below). The gravitational force on the bar acts in the -y direction. The bar is in a uniform magnetic field that is directed into the page and has magnitude B = 0.150 T. (a) What above the horizontal? (b) For the bar to be in rotational equilibrium, should I be in the direction from a to b or b must be the current I in the bar for the bar to be in rotational equilibrium when it is at an angle 0=30.0 degrees to a? You can use only formulas given on the formula sheets. 2 9 20 X X x Piot لى center otational equibr Tgravity gravity I mg gravity + magnetic = O in (Q) LX BX Co (0) Right ide Tt H +7 effect O ♡ >
Transcribed Image Text:2) A uniform bar has mass 0.0120 kg and is 30.0 cm long. It pivots without friction about an axis perpendicular to the bar at point a (see figure below). The gravitational force on the bar acts in the -y direction. The bar is in a uniform magnetic field that is directed into the page and has magnitude B = 0.150 T. (a) What above the horizontal? (b) For the bar to be in rotational equilibrium, should I be in the direction from a to b or b must be the current I in the bar for the bar to be in rotational equilibrium when it is at an angle 0=30.0 degrees to a? You can use only formulas given on the formula sheets. 2 9 20 X X x Piot لى center otational equibr Tgravity gravity I mg gravity + magnetic = O in (Q) LX BX Co (0) Right ide Tt H +7 effect O ♡ >
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