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A cannon fires a shell at an angle of 55.0° above the horizontal. The shell has a mass of 17.5 kg, and its initial speed as it leaves the cannon is 289 m/s. The cannon is not anchored to the ground. It is mounted on a base—a large block of wood—which is sitting on a level roadway. If the road exerts a steady kinetic friction force of 430 N on the cannon’s
sliding base, how much time does it take for the cannon to stop sliding after it fires the shell?

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