A mass mA = 2.2 kg , moving with velocity v⃗ A=(5.0iˆ+5.2jˆ−2.8kˆ)m/s, collides with mass mB = 3.8 kg , which is initially at rest. Immediately after the collision, mass mA = 2.2 kg is observed traveling at velocity v⃗ ′A=(−2.2iˆ+3.2kˆ)m/s.

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