申論題

5. As shown in the figure, a block of mass M = 5.40 kg, at rest on a horizontal frictionless table, is attached to a rigid wall by a spring with spring constant k = 6000 N/m. A bullet of mass m = 9.50 × kg and speed v strikes and is embedded in the block. After the bullet is embedded, the block and bullet undergo SHM with amplitude 1.50 × m. What was the bullet speed v (m/s)?_____