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Question

The muzzle velocity of a gun is the velocity of bullet when it leaves the barrel . The muzzle velocity of one rifle with a short barrel is greater than the muzzle velocity of the another rifle that has an longer barrel . In which rifle is the acceleration of the bullet larger ? Explain your reasoning

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Solution

The one with the higher velocity has the greater acceleration.
This is because it reaches a higher velocity in a shorter distance. To reach the higher velocity it has to accelerate to that velocity. It also has to get to that velocity in a shorter distance.

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