Question

define Newton's first law and second law

Answer 1

Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. 

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Answer 2

Newton's first law -
Every object continue its state if a object at rest then it will in rest and in motion then continue its motion unless external force is applied
if applied force = 0
then F= ma a = 0

2nd law :-The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass .
F α dp / dt