what is newtons 1 and 2 law of motion
Answers
Answer:
Newton's first law of motion predicts the behavior of objects for which all existing forces are balanced. ... The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
Answer:
First law of motion
A body at rest tends to remain at rest and a body in uniform motion tends to remain in the state of uniform motion until & unless an external force is applied on it.
For example, a ball lying on the table at rest will remain at rest until an external force is applied on it.
Explanation:
Second law of motion
The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction in which the force acts.
Alternatively, the relationship between an object's mass m, its acceleration a, and the applied force F is F = ma; the direction of the force vector is the same as the direction of acceleration vector.
F ∝ dp/dt [Greater the change in momentum, greater is force]
F = k dp/dt
F = dp/ dt
F = d/ dt (mv)
Let, m: mass of the body be constant
F = m dv/dt
F = ma
Newton’s Second law is consistent with the First law
F = ma
If F =0, then a = 0
According to First law, if a = 0, Then F = 0
Thus, both the laws are in sync.
Vector form of Newton’s Second law

Fx = dpx/ dt = max
Fy = dpy/ dt = may
Fz = dpz/dt = maz
Newton’s Second Law was defined for point objects. For larger bodies,
a: acceleration of the centre of mass of the system.
F: total external force on the system.