Magnetism Question Can't figure it out

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Homework Help Overview

The discussion revolves around a problem in magnetism involving the interaction of a charged bullet with the Earth's magnetic field. The scenario includes specific values for the magnetic field strength, the angle of the magnetic field, and the bullet's velocity, with the goal of determining the bullet's electric charge.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the angle between the velocity of the bullet and the magnetic field, with one participant suggesting a value of 59 degrees and another proposing to substitute this angle into the original equation.

Discussion Status

The discussion is ongoing, with participants exploring the implications of the angle on the calculation of the bullet's charge. There is no explicit consensus yet, but a potential direction for the solution has been suggested.

Contextual Notes

Participants are working with specific angles and values provided in the problem statement, and there may be assumptions regarding the orientation of the vectors involved that are being questioned.

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Homework Statement



In a certain region, the Earth's magnetic field has a magnitude of 5.5 x 10-5 T and is directed north at an angle of 40° below the horizontal. An electrically charged bullet is fired north and 19° above the horizontal, with a speed of 700 m/s. The magnetic force on the bullet is 3.9 x 10-10 N, directed due east. Determine the bullet's electric charge, including its algebraic sign (+ or -).

Homework Equations



F=qvBsintheta

The Attempt at a Solution



3.9E-10N= q* 700m/s(V)*5.5E-5T (B)*sin19
=3.1E-8N
 
Physics news on Phys.org
Angle between v and B is ...?
 
59degrees?
 
Substitute this value in the problem instead of 19 degrees.
 

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