Recent content by redroomreflex

5.52 seconds.

Okay... no... so it would be 2.76 seconds that it is in the air.

1.38 seconds.

The time calculated was when the ball's velocity is momentarily zero at the halfway point... so the fraction of time the ball is in the air would be half that time?

The part of the motion when the speed is zero is at the halfway point.

No, it doesn't. It goes through an upside down parabolic motion?.. yes?

Thanks Simon. And as dumb as this reasoning is... final velocity equals zero because that's when the ball is momentarily in the air for as it changes a downward direction down to the ground...

1. A ball is thrown vertically upward with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?Homework Equations vf (v final) = v0 (v initial) + at[/B]The Attempt at a Solution I set final velocity equal 0. So.. 0 = 27.0 m/s (initial velocity) +...