Two masses ' m _ a ' and ' m _ b ' moving with velocities ' v _ a ' and ' v _ b ' opposite directions collide elastically. Alter the collision ' m _ a ' and ' m _ b ' move with velocities and ' v _ b ' and ' v _ a ' respectively, then the r

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Two masses ' m _ a ' and ' m _ b ' moving with velocities ' v _ a ' and ' v _ b ' opposite directions collide elastically. Alter the collision ' m _ a ' and ' m _ b ' move with velocities and ' v _ b ' and ' v _ a ' respectively, then the ratio m _ a : m _ b is

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Correct answer: C. 1

When two bodies of equal masses collide elastically, they exchange their velocities. Since the two masses are exchanging their velocities, their masses must be equal. Hence, m _ a m _ b =1

Two masses ' m _ a ' and ' m _ b ' moving with velocities ' v _ a ' and ' v _ b ' opposite directions collide elastically. Alter the collision ' m _ a ' and ' m _ b ' move with velocities and ' v _ b ' and ' v _ a ' respectively, then the ratio m _ a : m _ b is

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