Physics Help Forum Magnetic forces and Magnetic fields Homework (in need of help ASAP)

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 Jan 23rd 2019, 06:40 AM #1 Junior Member   Join Date: Jan 2019 Posts: 1 Magnetic forces and Magnetic fields Homework (in need of help ASAP) hi! I really need help in solving this problem. i do not know hot to get the y and z components of the magnetic field vector. who can help me please? A 2.5 nC particle of mass 5.25x10^-6 kg moves through a uniform magnetic field of 7.5 T directed down at 30 degrees in the y-z plane. find the force on the particle at the instant its velocity is 8.0x10^4 m/s along the y axis.
Jan 23rd 2019, 08:25 AM   #2

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 Originally Posted by gwendalagan hi! I really need help in solving this problem. i do not know hot to get the y and z components of the magnetic field vector. who can help me please? A 2.5 nC particle of mass 5.25x10^-6 kg moves through a uniform magnetic field of 7.5 T directed down at 30 degrees in the y-z plane. find the force on the particle at the instant its velocity is 8.0x10^4 m/s along the y axis.
B is directed downward (aka in the negative z direction) at an angle of 30 degrees below the +y, so $\displaystyle B_y = B ~ cos(30)$ and $\displaystyle B_z = - B ~ sin(30)$.

If it helps you to visualize it recast this into the form that the field is 30 degrees below the +x axis. Then $\displaystyle B_x = B ~ cos(30)$ and $\displaystyle B_y = - B ~ cos(30)$.

-Dan
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