A chunk of clay of mass m1 = 0.39 kg is thrown in the x direction with an initial velocity of v = 28 m/s. It hits a box of m2 = 4.9 kg initially at rest and sticks. (a) Write an expression for the system's final velocity vf. (b) Assume the box had an initial velocity of vb in the positive x direction. Write an expression for the final velocity of the system. (c) If the box has an initial velocity of vb = 1.1 m/s, what is the final velocity of the system in meters per second?

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