Question

A student argues that momentum is not conserved as both vehicles are stationary after the collision but both were moving before the collision. State whether the student is correct or incorrect and explain your answer.

Answer 1

Momentum is conserved in collisions and explosions . ... Before the cannon is fired (the 'event'), the total momentum is zero. This is because neither object is moving. The total momentum of the cannon and the cannon ball after being fired is also zero, with the cannon and cannon ball moving in opposite directions.

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