Fill in the term that completes the statement
The north and south poles of a magnetic field produced by an electromagnet will switch when the direction of the
changes.
Intro
✓ Done
ctivity

Explanation:

the bal will not change its velocity.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west