I have read about Translatory Motion it says
"It is that motion in hwich body, which is not a point mass body is moving such that all its constituent particles move simultaneously along parallel straight lines and shift through equal distance in a given interval of time..
My question is that---
Q1. what are those constituent particles which are moving with the body?
Q2. what does the last line mean "shift through equal distance in equal interval of time"?
1) They could be atoms, molecules, ions, anything that has mass.
2) At the same velocity.