Planet k is 1.0x10 km in diameter. the free-talll acceleration (acpeleration only due to g on the surface of planet k is 9.0 m/s draw the fbd with a coordinate system and write out newton's second law for an cojec a. in free-fall on planet k what is the mass of planet k? what is the free-fall acceleration 5000 km above planet k's surface?

The magnets are probably damaged or there not strong enough to attached to the refrigerator

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.