Dynamics Part 1 upto Projectile Page 235 by M L Khanna for IIT JEE main Advanced and B.Sc. Jai Prakash Nath and Company Meerut IITJEE Engineering Entrance Series
“ Just as there is no loss of basic energy in the universe, so no thought or action is without its effects, present or ultimate, seen or unseen, felt or unfelt. ” ― Norman Cousins
