- #1
Lightfuzz
- 15
- 0
This question is probably really stupid but I have to ask.
I take a pot of water and stir it. This creates a vortex. When I stop stirring, the water continues spinning before slowing to a stop. But Newton's First Law says that "Every body persists in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by force impressed" and I thought that when I stop applying a force it should stop spinning since the water molecules would be accelerating in circular motion. There is another related issue. I decided to spin a trolley around and when I let go it kept spinning around. Why? (I know I'm probably missing something)
I take a pot of water and stir it. This creates a vortex. When I stop stirring, the water continues spinning before slowing to a stop. But Newton's First Law says that "Every body persists in its state of being at rest or of moving uniformly straight forward, except insofar as it is compelled to change its state by force impressed" and I thought that when I stop applying a force it should stop spinning since the water molecules would be accelerating in circular motion. There is another related issue. I decided to spin a trolley around and when I let go it kept spinning around. Why? (I know I'm probably missing something)