# Mr. Saturn

### In what sense does an object moving in a straight line (at constant velocity) have angular momentum? ?

Remember, angular momentum is dependent on angular velocity. Does this object have an angular velocity relative to some point?

2 AnswersPhysics3 months ago### Physics : Center of Mass Question?

If someone launched a toy rocket, straight up, that broke into 3 parts of equal mass at its peak, and one piece landed 2 meters to the left of them and another piece landed 2 meters behind them, where did the third piece land? Assuming none of the pieces traveled any higher after the separation.

I had the idea that the pieces would land equidistant from each other, since their mass is the same, but that would mean the center of mass isn't at the origin where the rocket was launched, since it went straight up. Not sure if the center of mass has to be at the origin though...

2 AnswersPhysics3 months ago### Is a sphere with no radius still considered a sphere? And how about a cylinder with no radius?

If a sphere has no radius, is it still considered a sphere? If not, is it considered a point or just nonexistent in general?

Same for a cylinder. If it has no radius is it still a cylinder? or is it just a line, or just nonexistent?

Just curious

4 AnswersMathematics4 months ago