Physics vs Math: Comparing Difficulties

[DukeofDuke]

Why not? What prevents me from stopping at a point and then start walking into a different direction?

My roommate wants to know if you were joking. He has a crap sense of humor. Were you? Or did you seriously ask why you can't turn a corner without decelerating?
(that's the key to the problem, he's not slowing down as he turns the corner).

 

[dacruick]

physics is better.

 

[Heresy]

Why not? What prevents me from stopping instantaneously at a point and then start walking into a different direction at the same speed as before?

The fact that you don't want to rip your body apart by trying.

 

[owlpride]

My roommate wants to know if you were joking. He has a crap sense of humor. Were you? Or did you seriously ask why you can't turn a corner without keeping the same velocity?

Is your roommate about to show me how I would walk along a circular path with constant velocity?

 

[dacruick]

I think the idea that heresy is trying to very subtly and condescendingly imply is that you need a deceleration. The only way for you to be going a certain speed and then to stop instantaneously is if an infinite force is applied to you, hence the ripping apart of your body. But if you measure your distance in steps, You can stop instantaneously because your measurement of distance is discrete. and then you can start at the same speed once again for the same reason.