Three particles enter a region of constant magnetic field into the page (b = 0.5 t)if the particles all move at the same speed v and have the same charge q, which particle has the largest mass? #1#2#3

1. explain how you calculate the net force in any direction on the box. 2. suppose an upward force of 15n is added to the box. what will be the net vertical force on the box? 3. what force could be applied to the box to make the net force in the horizontal direction zero? explain. 4. suppose a force of 25n to the right is added to the box. what will be the net force to the right?