What was a reason why the us change the foreign policy

America's contribution to fighting and readiness for battle over the last 100 years has been the primary source of this transition. War has skewed our institutional structure, our national growth path, and our people's very mindset.

Explanation:

America's contribution to fighting and readiness for battle over the last 100 years has been the primary source of this transition. War has skewed our institutional structure, our national growth path, and our people's very mindset.

Answer is above.

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ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j