Which truck is at rest and which one is accelerating? #asknostr #science
Discussion
B at rest
A accelerating
Correct, the balloon goes in the opposite direction of the force when accelerating.
A is doing forwards flips ; C is doing backwards flips.
This is the 💯 correct answer.
They're all accelerating but B is at rest
Correct, A acceleration forward, C acceleration backwards.
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He's probably refering to the counterintuitive "helium balloon in a truck"- riddle.
A is accelerating. B is at rest or at steady speed. C is reversing or braking.
Correct 💯💪
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Rest: B
Accelerating: C
Braking: A
See it as the inertia of the surrounding air is higher than the inertia of the helium due to its lower density.
That means when accelerating (forward) the air is flowing "backwards" faster than the helium.
Important to note is that the air is in a container. Helium is less dense than the air, so buoyancy follows the direction of the force. So C would be acceleration forward. If it was something more dense than air, it would be A acceleration forward as there would always be displacement with acceleration.
Correct
What is the trucker wearing?