What does gain in momentum practically mean?

Question

dls · Answer

gain in velocity is alright but gain in mass?? :O

anonymous · Answer

That is Only in the Case when..Mass is not Constant

anonymous · Answer

Eg: Rocket

dls · Answer

When a man jumps out of a boat to the shore,the boat slightly moves backwards..

dls · Answer

we say he gains momentum,to counterbalance boat moves back..so he is gaining mass?

anonymous · Answer

Since...the man...Gives Some force to Boat...

anonymous · Answer

in that case mass is constant...)

dls · Answer

so,why don't we say he is gaining "velocity"?

anonymous · Answer

Can u be Specific

dls · Answer

P=MV
M=Constant,so he is basically gaining only velocity?sowhy we say momentum..)

anonymous · Answer

owhy we say momentum.??????

dls · Answer

yeah,coz no effect on mass?

anonymous · Answer

F = ma 
F = m dv/dt

dls · Answer

?

anonymous · Answer

Compare a 100 kg man running at 10 m.s−1 with a bullet of mass 40 g and speed 500 m.s−1. KE the same but  the man's momentum has a magnitude 1,000 kgm.s−1 while the magnitude of bullet's momentum is only 20 kgm.s−1.

there is one practical meaning....

dls · Answer

oop,posted in maths..sorry!

dls · Answer

oops*

anonymous · Answer

Math and Physics sort of connected (should be)

dls · Answer

hmm..yeah

anonymous · Answer

Or , better Applied Math and Physics...

anonymous · Answer

Like the old days....