A helium-filled balloon is tied to a light string inside a car at rest. The other end of the string is attached to the floor of the car, so the balloon pulls the string vertical. The car’s windows are closed. Now the car accelerates forward. Does the balloon move? If so, does it move forward or backward? Justify your reasoning with reference to buoyancy. (If you have a chance, try this experiment yourself—but with someone else driving!)
A helium-filled balloon is tied to a light string inside a car at rest. The other end of the string is attached to the floor of the car, so the balloon pulls the string vertical. The car’s windows are closed. Now the car accelerates forward. Does the balloon move? If so, does it move forward or backward? Justify your reasoning with reference to buoyancy. (If you have a chance, try this experiment yourself—but with someone else driving!)
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A helium-filled balloon is tied to a light string inside a car at
rest. The other end of the string is attached to the floor of the car, so the
balloon pulls the string vertical. The car’s windows are closed. Now the
car accelerates forward. Does the balloon move? If so, does it move forward
or backward? Justify your reasoning with reference to buoyancy.
(If you have a chance, try this experiment yourself—but with someone
else driving!)
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