Question: Please help me with this practice physics question: When you drop a stationary steel block straight down on a moving cart, the cart slows down.

Please help me with this practice physics question:

When you drop a stationary steel block straight down on a moving cart, the cart slows down. Use conservation of momentum to explain why this must happen

1st by taking both the cart and the block as your system.

2nd by taking only the cart as your system.

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