II. Two metal balls are hanging from the ceiling by light weight cords. Ball 1 has mass m, = 40.0g and ball 2 has mass m, = 80.0g. Pull ball 1 to the left to a height of h, = 20.0cm and release it from rest. Ball 1 will swing down and collides elastically with ball 2. After collision, ball 1 will swing back to the left and ball 2 will swing to the right. Find out: a) the velocity of ball 1 right before hitting ball 2 (use conservation of mechanical energy), b) the velocities of ball 1 and ball 2 right after collision (use conservation of linear momentum), c) the maximum height that these two balls can reach (use conservation of mechanical energy). %3D %3D %3D 20.0CM

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