Compute all parts of following question:
Question: A particle with a charge of -1.85×10-8C is moving with an instantaneous velocity of magnitude 40.5km/s in the xy -plane at an angle of 50.5 degrees counterclockwise from the +x axis.
Part A: What is the magnitude of the force exerted on this particle by a magnetic field with magnitude 2.00T in the -x direction?
Part B: What is the direction of the force exerted on this particle by a magnetic field with magnitude 2.00T in the +z direction?
Part C: What is the magnitude of the force exerted on this particle by a magnetic field with magnitude 2.00T in the +z direction?
I known the correct answer but I need to know how to get that. Thanks in advance!