What happens when an object has a net force of zero?

When the resultant force on an object is zero, it will remain at rest if it is at rest, or continue to move in a straight line at a constant velocity if it is in motion. ... If no net force is applied to the object along the x-axis, it will continue to move along the x-axis at a constant velocity with no acceleration.

Explanation:

50 inches should be the resultant vector

so easy. just google the electromagnetic waves and it’ll pop up.