Originally Posted By: paul
that is the CHANGE IN MOMENTUM OF THE BALL

BINGO!


Quote:

the force that is its mass * velocity.

I don't care where you got this equation from or what other applications it's used in. IT IS AUTOMATICALLY WRONG. Why? Because the dimensions are inconsistent:
F = 100kg * 40m/s
F = 4000 kg m/s

Is "kg m/s" a unit of force? Can you convert it to newtons?
You can check with these google searches:
"4000 kg m/s in N"
"4000 kg m/s^2 in N"





Here's another reason it can't be right:
You claim:
F=ma
F=mv and
p=mv

Therefore:
F=p
ma=mv
a=v

Acceleration is always equal to velocity??



Quote:

or your used to using p=mv
the momentum that is its mass * velocity

At least we agree on something.