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A ball has a mass of 6.5 kg and a velocity of 5.5 m/s [N30°E]. After rolling across the floor (of negligible friction), it collides with another stationary ball of equal mass. After an elastic collision, the first ball has a velocity of 4.5 m/s [S60°W]. What is the velocity of the other ball after the collision?
Sagot :
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