(a) Exiting from a small linear accelerator near Washington D. C., a proton is moving parallel to the ground. What should the direction(s) of its velocity be in order to maximize the upward component of the Earth’s magnetic force on it?
(b) Using a value of 0.05 mT for the value of the horizontal component of the Earth’s magnetic field at this location, what is the upward acceleration of the proton as it exits the accelerator at a speed of 2000 m/s?