Answer:
The minimum velocity of the ball during its flight is 22.98 m/s.
Step-by-step explanation:
The velocity of the ball v = 30 m/s
The angle it makes with the horizontal ∅ = 40°
The minimum velocity of the ball during flight will be the horizontal axis component of the velocity, as acceleration is zero on this axis.
= v cos ∅
= 30 cos 40°
= 30 x 0.766 = 22.98 m/s