Newton's third law of motion: every action has an equal and opposite reaction.
It appears to move in the opposite direction to the motion of the van
It accelerates in the opposite direction. Its velocity increases in the opposite direction to the direction that has been assigned positive.
the water or fluid will be moving the opposite direction
The light hits the mirror causing it to go off in its opposite direction. Its reflecting off off the mirror because of the particles inside of the mirror
If that happens, the body's speed will decrease.
Moves it the opposite direction.
if the values are the same then nothing happens.
It slows to a rest and then starts moving in the opposite direction at constant acceleration in that direction.
It is seen in the opposite direction in which you moved it. I did this experiment last Friday.
Because your feet are pushing backwards and therefore the friction opposes in the opposite direction which happens to be the direction in which you are walking.
You are either pushed the opposite direction of the current or go nowhere.
If they are equal in values - nothing. Otherwise, it will move to the same direction as the direction of the greater force.