The Spring Constant for the Spring in a Special Cannon

question 17

Multiple Choice

The spring constant for the spring in a special cannon is 1800 N/m. In cocking the cannon, the spring is compressed 0.55 m. What is the initial speed of a 7.0-kg cannonball at rest on the free end of the spring when it is released?

• A)77 m/s
• B)140 m/s
• C)12 m/s
• D)8.8 m/s
• E)16 m/s

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