Question

State Newton's second law of motion use this to find the method to measure force acting on the object

Answer 1

Newton's Second law of motion :- The rate of change of momentum is directly proportional to the force applied on the system. 

m= mass of the body
u= initial velocity of the body 
v= final velocity of the body
t= time for which the force is applied
F = an external force applied on body

pf - pi / t ∝ F 

Momentum ( P) = mv .
mv - mu / t ∝ F 

F ∝ m ( v-u) /t

F ∝ ma. 

F = kma. 

hope there is no mistake
(⌒o⌒)

Answer 2

Newton's second law of motion :

It states that rate of change of linear momentum is directly proportional to the external force applied on the body .

F ∞ p/t

Initial velocity = u
$p_{i} = mu$
Final Velocity = v

$p_{f} = mv$
Change in momentum = mv-mu

F ∞ m(v-u/t)

As , a = v-u/t

F ∞ ma
Kg m /sec² = Newton

gm cm/sec² = Dyne

F = ma

1 N = kg m sec²

1 N= Force is said to be 1 N if it produces an acceleration of 1 m/sec² in a body of mass 1 kg .


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