2
The car has traveled a total distance of 18 miles (10 miles south + 8 miles north), but its displacement is 2 miles south. Displacement is the shortest distance between the starting and ending points, regardless of the actual path taken.
2
2
The earth never reverses direction, nor does any other planet. The APPARENT reversal of direction of some other planets, as seen from earth, is called retrograde motion.
Mekong River
Displacement and acceleration are zero at the instant the mass passes through its "rest" position ... the place where it sits motionless when it's not bouncing. Velocity is zero at the extremes of the bounce ... where the expansion and compression of the spring are maximum, and the mass reverses its direction of motion.
Any wind system on a continental scale that seasonally reverses its direction is a monsoon system. It affects large climatic regions.
The magnetic field reverses direction.
If the motion is on a straight line and the impulse reverses the direction, the impulse will follow the same direction as the final motion.
The circuitry "remembers" the previous direction and reverses that direction.
which wind system reverses its direction seasonally
An "Alternating Current" (AC).
AC (alternating current).