A 5.00-g bullet moving with an initial speed of vi = 390 m/s is fired into and passes through a 1.00-kg block as shown in the figure below. The block, initially at rest on a frictionless, horizontal surface, is connected to a spring with force constant 860 N/m. The block moves d = 5.60 cm to the right after impact before being brought to rest by the spring a) Find the speed at which the bullet emerges from the block.=----m/s b) Find the amount of initial kinetic energy of the bullet that is converted into internal energy in bullet–block system during the collision. =-------J

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