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A moving body with a mass m(1) strikes a...

A moving body with a mass `m_(1)` strikes a stationary body of mass `m_(2 )`.The masses `m_(1)` ,and `m_(2 )` ,should be in he ratio `m_(1)`/`m_(2 )` so as to decrease the velocity of the first body 1.5 times assuming a perfectly elastic impact. Then the ratio `m_(1)`/`m_(2 )` is

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