Alexandria (50-kg) and Frederick (70-kg), both on roller skates, push off each other abruptly. Each person coasts backward at approximately a constant speed. Alexandria moves at 4-m/s. Find the speed that Fredrick moves. Also, draw momentum diagrams. props to whoever knows how to do physics

The magnets would be | n s | and | s n|

Amplify and switch electrical power and electronic signals

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.