In a collision, is the net impulse experienced by an object equal to its momentum change?

1 Answer
May 1, 2014

Yes. Impulse is defined as the change in momentum over an arbitrary time interval, or equally as the average force times the difference in time.

#J = Deltap#
#J = F_(avg)*(Deltat)#

You can see from the second equation why the unit of impulse is typically the Newton-second. (#N*s#)

If you know an object's initial momentum and its final momentum, the impulse is given by the difference between the two values.

#Deltap = p_(f) - p_(i)#
#J = p_(f) - p_(i)#