Question

show that second law is the measure of force

Answer 1

HEY MATE HERE IS YOUR ANSWER

it states that the rate of change of momentum is directly proportional to the force applied that is
$\frac{pf - pi}{time} \alpha f$
proof of second law of motion: according to second law of motion where pf is final momentum, pi is initial momentum and f is force applied

As pf= mv
pi=mu
${mv - mu}^{t} = kf$
their k is constant of proportionality by experiment we know that K = 1

$\frac{m(v - u)}{t} = (1)f$
$= > ma = f$
$= > f = ma$

Answer 2

$\huge{HEY MATE!!!}$


HERE IS UR ANSWER ⏬⏬⏬⏬⏬

Second law of motion states that : the rate of change of momentum is directly proportional to to the force acting and takes the direction in which force acts 

Now, 

consider a body has Mass 'm', moving with a initial velocity 'u', so it initial momentum will be mu.now suppose that the bory stops in time t,then its final momentum would be mv/t 

 

force is directly proportional to (mv-mu) /t

Force = m x a 

SI unit of force is Newton(N).

 ⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩

HOPE IT HELPS.