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Q.

You are sitting in a stationary car with a helium balloon tied to its floor. You accelerated and felt like you were pushed back so the balloon

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a

Will move forward

b

Will move backward

c

Will remain state

d

None of these

answer is A.

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Detailed Solution

You are sitting in a stationary car with a helium balloon tied to its floor. You accelerated and felt like you were pushed back so the balloon would move forward.
Assuming ideal conditions where doors and windows are closed when a car moves forward, it will push the air forward, and the air will push the balloon forward. We know that helium is less dense, so when air particles transfer their momentum, helium will move forward.

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