A smooth card is placed over a drinking glass. A penny is placed in the middle of a card. When the card is hit with the index finger, the card moves away, and the penny drops into the glass. Which statement BEST explains why the penny does not move in the same direction as the card?

A. There is an absence of friction between the penny and the card

Explanation:

If the penny had more inertia, it would move in the same direction as the card, but faster. If it's a smooth card, then there's no friction to cause the penny to move with the card.

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