Define Newton's law of motion

Newtons laws of motion describe the relationship between the motion of an object and the forces acting on it

Newton's laws of motion are three laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it. These laws can be paraphrased as follows: Law 1. A body continues in its state of rest, or in uniform motion in a straight line, unless acted upon by a force.

c) up is the direction the magnetic force is acting on the charge.

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it