To and fro motion of an object is also known as :
Question 11
Fill in the blanks (i) Motion of an object or a part of it around a fixed point is known as ___ motion.
(ii) A body repeating its motion after a certain interval of time is in ___ motion. (iii) In a rectilinear motion, the object moves ___ a ___ line. (iv) SI unit of length is __.