Question

If j→is impulse. What is dj/dt=?

Answer 1

Impulse is change in momentum, p = mv, hence
\[ \frac{dj}{dt} = \frac{d \ }{dt} (mv) \]
which is force.

Answer 2

Usually in fact we define impulse as
\[ j = \int F \ dt \]
Hence by the Fundamental Theorem of Calculus,
\[ \frac{dj}{dt} = F \]

Answer 3

thnx :)