In terms of momentum conservation, why does a cannon recoil when fired?
The reason that a cannon recoil when fired in terms of momentum conservation.
Answer to Problem 15A
Since initial net momentum is zero, thus to make the final momentum zero, the cannon recoil in opposite direction of the motion of cannonball.
Explanation of Solution
Introduction:
Momentum is given by the product of the mass
And, law of conservation of momentum is given by,
Since initially both the cannon and cannonball are at rest, thus the initial momentum of the system is zero. Thus,
Or,
Conclusion:
When fired, the cannon moves in opposite direction of motion of the cannonball, and hence it recoils.
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Conceptual Physics: The High School Physics Program
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