The wheel of a car completes 1200 rotations per min. On pressing the accelerator of the car 4500 rotations per min is executed by wheel after 10s. Find the angular acceleration and angular displacement in 10s. Also how many rotations are executed in this time?

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

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. 

The independent variable in this experiment is the angle at which the light from the ray box strikes the mirror.hope this .

  the answer is don't know.