Newton's Laws for software engineers 

Law -1.

Every Software Engineer continues his state of chatting or forwarding mails unless he is assigned work by external unbalanced manager.

Law -2.

The rate of change in the software is directly proportional to the payment received from client and takes place at the quick rate as when deadline force is applied.

Law -3.

For every Use Case Manifestation there is an equal but oppositeSoftware Implementation.

Bonus Law 4.

Bugs can neither be created nor be removed from software by a developer. It can only be converted from one form to another. The total number of bugs in the software always remains constant.