Question

Which has more momentum, a 8kg object moving at 9ms or a 4kg object moving at 7ms?

Answer 1

P=mv

So obviously p=8×9=72

p=4×9=36

The first one

Answer 2

case 1

m=8kg

v=9m/s

case 2

m=4kg

v=7m/s

case 1

momentum = mass × velocity

=8×9

=72

case 2

momentum = mass × velocity

=4×7

=28

therefore the object having mass of 8 kg and velocity of 9 m/s has more momentum