Log in to add a comment

## Answers

The law states that the rate of change of momentum of a body is proportonal to the Force

producing it and takes place in the direction in which the force acts.

Momentum of a body = P = mass* velocity = mV (Vector quantity) ; V = Velocity

Let m = mass of the body

Initial velocity = u ; initial momentum = mu (Vector)

Final velocity = v ; final velocity = mv (vector)

Time interval = t

Change in velocity = m(v - u) (vector)

Rate of change of momementum = m(v - u) / t = m{(v- u)/t} = ma (vector) ; a = acceleration (vector)

according to newton's second law

appiled force= f

mass=m

intial velocity =u

final velocity= v

time= t

intial momentum (p) =mu

final momentum (p) =mv

change in momentum (delta P) =mv-mu

rate of change in momentum = (delta p/t)

=mv-mu/t

m(v-u)/t

=ma(∴a=v-u/t)

=according to 2nd law

f alfa ma

=f=kma

where k= proportional constant

k=1

f=1×ma

=f=ma