A 100-Kg Cannon at Rest Contains a 10-Kg Cannon Ball

question 61

Multiple Choice

A 100-kg cannon at rest contains a 10-kg cannon ball. When fired, the cannon ball leaves the cannon with a speed of 90 m/s. What is the recoil speed of the cannon?

• A)4.5 m/s
• B)9 m/s
• C)45 m/s
• D)90 m/s
• E)zero m/s

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