Uploaded January 2026 | Updated September 2026, 3 days ago

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- If the car goes at a steady speed, you sit still. That's like the water in Truck A.

- If the car suddenly speeds up, your body gets pushed back into your seat. That's like the water in Truck C.

- If the driver suddenly hits the brakes, your body flies forward. That's just like the water in Truck B! The truck stopped, but the water wanted to keep going.

The answer is B.