Question

what is newton first law?

Answer 1

An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
http://www.physicsclassroom.com/class/newtlaws/u2l1a.cfm

Answer 2

there is at least one repository where the motion of an isolated body is uniform rectilinear

Answer 3

unless and until a force acts on a body, a body at rest continues to be at rest and a body in motion continues to move with uniform velocity.

Answer 4

A body remains at rest unless an external force is applied.