The answer is A I had this question. Before
Answer:
A. A sea wave generated by a displacement of water
Explanation:
In projectile motion horizontal motion has zero acceleration and when there is no air resistance acting on the object the motion will be uniform. Motion in the vertical direction is accelerated downwards to to the acceleration due to gravity
V(y) is the same in all cases so time taken for all cannonballs to go up and down is the same.
Divide 30 by 5 and you will get how many seconds it would take for you to hop 30 meters