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A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters
A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet's acceleration as it passes through the board? -500 km/s b. -550 km/s C. -360 km/s d. -520 km/s' e. -275 km/s
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