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  • Writer's picturekeshprad

Princeton Review 16th Edition PT1 Q62


62) This question is asking us to find the ratio of the momentum of two simultaneously dropped objects just before they hit the ground. Firstly, the equation for momentum can be expressed with the following equation.

Where p is momentum, m is mass and v is velocity

The most important word in this question is simultaneously. Since the objects are dropped simultaneously, this means regardless of their mass, they will be accelerated at approximately 9.8 m/s^2. The problem also says the two objects are dropped, which means they start with no initial velocity. Since they start at the same velocity, are subject to the same acceleration, and are dropped from the same height, this must mean just before hitting the ground the objects will have the same velocity. We can use this information to solve the question.

Answer: B

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