Question

Old naval ships fired 10 kg cannon balls from a 200 kg cannon. It was very important to stop the recoil of the cannon, since otherwise the heavy cannon would go careening across the deck of the ship. In one design, a large spring with spring constant 20,000 N/m was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to the ship’s frame. When the cannon fired, the spring compressed 50 cm. (a) How fast could this cannon fire cannon balls? (b) Use Dimensionality sense-making to check the expression you derive in part (a)

Answer 1

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