1
$\begingroup$

Bike mounted on hitch rack.
Why wheels spin constantly while I drive?

I can't find anything on the internet. The kids in the other cars love to watch them

$\endgroup$
1

1 Answer 1

4
$\begingroup$

The air flow around the car creates a vortex. There is an image of the air flow around a car:

enter image description here

which was used by this earlier answer - that rotating air behind the car is what spins the wheels of the bike.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.