Question

Under what condition motion can be circular, rectilinear or zig zag

Answer 1

Answer:

A line need not be a straight line…A sphere can have many lines drawn over its surface…

A river appears to follow a linear path - but that line is zig-zag…

Rectilinear means along a straight line - the X, Y and Z axes represent the three possible rectilinear motions…in three different directions / dimensions.