Choose either true$/$false or the correct answer for the following statements:

$-$A bird flying through the sky is an example of an object in free$-$fall. $-$A space shuttle re$-$entering Earth's atmosphere with no thrusters is an example of an object in free$-$fall.

$-$A bowling ball shot into the air at some angle is an example of an object in free$-$fall.

An object is thrown straight up in the air. Its acceleration at the top of its trajectory is

$\_\_\_\_\_($Positive$,$ Negative, or zero$)$

A ball is thrown straight up at an initial speed

v$0$

from the top of a building. When it passes the edge of the building on the way down to ground level, its speed is

less than

its initial speed.

A ball is thrown straight up at an initial speed

v$0$

from the top of a building. When it reaches ground level, its speed is

$---$

its initial speed.