Q. A uniform magnetic field of magnitude B= 1.2 teslas is directed toward the bottom of the page in the -y direction as shown above. At time t=0, a proton p in the field is moving in the plane of the page with a speed v0= 4 x 10^7 meters per second in a direction 30 degrees above the x axis.

A) calculate the magnetic forece on the proton at t=0
B) with reference to the coordinate system shown above on the right, state the direction of the force on the proton at t=0
C) how much work will the magnetic field do on the proton during the interval from t=0 to t=.5 secnonds?
D)describe but do not calculate the path of the proton in the field