Use the equation of gravitational force, that is, use F=-G (m1)(m2)/r^2, to find the weight of a crate whose mass is 30 kg. The Earth’s mass is 6x 10^24 kg, and its radius is 6.4x 10^6 m. ( G =-6.67x10^-11)

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.