Which has more momentum, an object with a mass of #5kg# moving at #15m/s# or an object with a mass of #20kg# moving at #17m/s#?

1 Answer
Jan 25, 2016

Answer:

I would go for the object with bigger mass and velocity.

Explanation:

Momentum #vecp# is given, along the #x# axis, as:
#p=mv#
so:
Object 1: #p_1=5*15=75kgm/s#
Object 2: #p_2=20*17=340kgm/s#

You can "see" momentum by thinking of catching a ball with your hands:
here you compare catching a basketball and an iron cannonball; even if the velocities aren't so different, the masses are quite different...!