Answer :
They have the same acceleration, which is the acceleration due to gravity. This is because they accelerate only in the y-direction, there is no acceleration in the x-direction.
They hit the ground at the same time because they have the same initial y-velocity, distance, and acceleration.
They hit the ground at the same time because they have the same initial y-velocity, distance, and acceleration.
Both horizontal accelerations are zero. Both vertical accelerations are equal . . . the acceleration of gravity. They fall for the same length of time. If thrown at the same time, then they hit the ground at the same time. A bullet shot from a high powered rifle and one dropped from the muzzle at the same time hit the ground at the same time.