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**Question:**

A sandwich sits on the edge of a circular serving platter that is spinning. The sandwich is speeding up as the platter spins. Which statements are true?

- ( ) none of these
- ( ) The sandwich has a tangential acceleration.
- ( ) There is a centripetal acceleration.
- ( ) The sandwich has a centrifugal acceleration.

**Explanation:**

This is a multiple-choice question discussing the accelerations involved when a sandwich is placed on the edge of a spinning circular serving platter. The platter's increasing speed implies different types of acceleration might act on the sandwich.

1. **Tangential Acceleration**: This refers to the acceleration that occurs when the speed of the object moving along a circular path changes. Since it states the sandwich is speeding up, there is tangential acceleration.

2. **Centripetal Acceleration**: This is always present in circular motion, directed towards the center of the circle, keeping the object in motion along the circular path.

3. **Centrifugal Acceleration**: This is a fictitious force perceived in a rotating reference frame, directed outward from the center. It is not a real force in an inertial frame.

Therefore, the statements about tangential and centripetal acceleration are relevant to the situation described.

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