Proton Speed in Constant Magnetic Field

AI Thread Summary
A proton traveling at an initial speed of 1.5x10^6 m/s enters a constant magnetic field of 1.5T at a 30-degree angle. The discussion clarifies that while the proton's path will change due to the magnetic field, its speed remains constant. Participants confirm that the speed of the proton does not change over time when subjected to a magnetic field. The focus is on understanding the effects of the magnetic field on the proton's velocity vector rather than its speed. Ultimately, the proton's speed 4 seconds after entering the magnetic field remains 1.5x10^6 m/s.
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Traveling at an initial speed of 1.5x10^6m/s, a proton enters a region of constant magnetic field of magnitude 1.5T. If the proton's initial velocity vector makes an angle of 30 deg with the magnetic field, what is the proton's speed 4s after entering the magnetic field?



Not sure what equations to use.



I said that the speed did not change. Sure the path did...
 
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You're correct, the speed does not change in a magnetic field.
 
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