Momentum is a conceptAs real as it can be; The product of an object’s massAnd its velocity. Its direction and its size are fixed. They never change a bit, Unless a force acts for a time(An impulse acts on it) It takes a mile to stop a train That’s loaded down with freight. Although velocity is slow, Its mass is very great. A bullet from a rifleIs rather short on mass. But deadly speed it has to spare, So duck and let it pass.
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Momentum is a conceptAs real as it can be;The product of an object’s massAnd its velocity.
Its direction and its size are fixed.
They never change a bit,
Unless a force acts for a time(An impulse acts on it)
It takes a mile to stop a train
That’s loaded down with freight.
Although velocity is slow,
Its mass is very great.
A bullet from a rifleIs rather short on mass.
But deadly speed it has to spare,
So duck and let it pass.