newton law 1

a body will remain at rest or move at constant velocity in straight line unless acted upon by resultant external force

tendency of a body to resists changes in its state of rest or uniform motion in straight line

inertia

as mass increases, resistance to change in its state increases cos of inertia

inertia is directly proportional to mass

for every action there's an equal(in magnitude) and opposite(in direction) reaction.

law 3

f=ma, the acceleration of a body is directly propotional to the resultant force and inversely proportional to mass

law 2

mass and weight

amount of matter in an object(scalar) weight is a force the quantifies mass with direction(vector)