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I am studying for the CAP physics contest and came across this question:
"You are holding a bottle of pop in your hands on a bus. The bubbles in the pop are going straight up. Suddenly, the bus brakes hard to avoid a road hazard. How is the motion of the bubbles in the pop affected?"
I believed that since the bubbles are moving forward in their intertidal frame of reference, that they would move backwards in the drink. However, the answer is they would move towards the front of the bus. I was hoping someone would be able to help me understand why?