What type of device contains an electromagnet that rotates between the poles of a magnet? (electrical to mechanical energy) HELP

With these questions , 15 pts & brainliest

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

Positive ions differ from neutral atoms in that