Two footballs are kicked from the ground with equal initial speeds. Ball A is launched at a greater angle above the hori

[answerhappygod]

Two footballs are kicked from the ground with equal initial
speeds. Ball A is launched at a greater angle above the horizontal
than ball B.
(a) Determine which ball reaches a higher elevation.
(b) Determine which ball stays in the air longer
You are swinging your keys at the end of a lanyard in a
horizontal circle around your head. What is the effect on the
magnitude of the centripetal acceleration of the keys in each
case?
(a) You keep the radius of the circle constant but half
the speed.
(b) The speed of the keys stays the same, but you triple the
radius of the circle