½ pteach & ½ pt for stamp Only a vector quantity has direction. Speed has no direction but velocity does. 20 km/hr
There is no horizontal force acting on it (gravity is only vertical). Gravity only affects objects in the vertical direction. They are the same (only affected by gravity) They hit at the same time.
Straight up ; 45 degrees 20 m/s Satellite 8 km/s
To avoid atmospheric friction. Gravity