I can state better when I understand initial velocity - for me when object is dropped from height or thrown with a velocity upwards both of them has velocity zero when it is in hand but both of them have a velocity when it leaves the hand - but then I am not sure when do we measure initial...
Why we take initial velocity of dropped object downwards as 0 and 25m/s when the object is thrown 25m/s upwards ?
What is then initial velocity cause when t=0 both object dropping and moving upwards had 0 velocity - in other words when object came to motion at both places it had some velocity?