Answer to Question #194735 in Classical Mechanics for Bryan barton

Question

If I throw a ball up in the air it will eventually reach zero velocity before descending. My question is this: how long will the ball be at zero velocity? It seems to me that this time interval should be infinitesimally small. What am I missing?

Answer 1

$\text{The ball will have a speed equal to zero during the time :}$

$t = 2\Delta t$

$\text{where }\Delta t \text{ the absolute error of time measurement}$