Figure 9-55 shows a two-ended rocket that is initially stationary on a frictionless floor, with its center at the origin of an x axis.The rocket consists of a central block C (of mass M ! 6.00 kg) and blocks L and R (each of mass m ! 2.00 kg) on the left and right sides. Small explosions can shoot either of the side blocks away from block C and along the x axis. Here is the sequence: (1) At time t ! 0, block L is shot to the left with a speed of 3.00 m/s relative to the velocity that the explosion gives the rest of the rocket. (2) Next, at time t ! 0.80 s, block R is shot to the right with a speed of 3.00 m/s relative to the velocity that block C then has. At t ! 2.80 s, what are (a) the velocity of block C and (b) the position of its center?

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