Fill in the blank with the correct word to complete each sentence. motion 11. De rodio - the motion that repeats itself after definite time intervals 12._ - the motion which is a combination of rectilinear motion and circular motion. 13. the movement of an object along a straight line 14. the movement of an object around a fixed point such that its distance from the center remains the same 15. -is a concept in motion which is the rate at which an object covers distance.​