Question

State Newton's second law of motion and prove that F=ma.Define one Newton..plzz answer..

Answer 1

Newton's Second Law of motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force. 

F = mv - mu / t

= m ( V - u ) / t

F = m a
Proved

When a mass of 1 kg produces an acceleration of 1m/s^2 then 1N of force is applied..

Answer 2

$\huge\textbf{Law of Force :}$


It is Newton's Second law.

According to it the rate of change of linear momentum is directly proportional to the external force applied.

F α dp/dt 

F = k dp/dt

Now,

p (momentum) = mv

So,

F = k d(mv)/dt

F = k md(v)/dt

F = k ma

(As, dv/dt = a)

Experimentally k =1

So,

$\textbf{F = ma}$
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