Can you please explain to me how to solve this problem? I\'m not quite sure how

Question

Can you please explain to me how to solve this problem? I'm not quite sure how to approach this problem.

3. The X-Men (plus Magneto) are at baseball practice. Storm hits the ball and in the process charges it to-10C. At the apex of the ball's trajectory (ie, when the ball only has horizontal velocity-in the +z direction), Magneto uses his magnetic abilities to change the trajectory of the ball. If the ball experiences a downward force, what direction is the magnetic field created by Magneto? List all possible options.

Explanation / Answer

Considering Velocity as horizontal directed towards right along +X direction.

Using formula for Lorentz Force as F = q (V X B), therefore to create a downward Force, Magnetic Field should be present in the horizontal plane, making an angle greater than 0 degrees and less than 180 degrees with the +X Axis

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