a ball on the ground
a golf ball obviously...
If dropped from the same height, they will hit the ground at the same time.
In a vacuum, they will hit at the same time.
Assuming both were dropped from the same height above ground, in a vacuum both would hit the ground at the same time. In a significant atmosphere (e.g. average ground-level on Earch) the bowling ball would hit the ground first.
If they are released at the same time at the same height they will hit the ground at the same time.
No. They will hit the ground at the same time. The inertia for the heavier ball will be greater, but the acceleration for both will be the same, and both would (if the air resistance is the same for both) hit at the same time.
Yes, they will if they are drooped from the same height and at the same time they will hit the ground at the same time
they hit the ground at same instant
In vacuum they reach ground exactly at the same time. In a medium other than vacuum the ball will reach ground first.
A bowling ball and a soccer ball, dropped from the same height will hit the ground at exactly the same time.
Friction
No. The change in potential energy and momentum both depend on the mass of the object, and the metal ball and plastic ball have different masses. What's the same for both of them is their acceleration while they fall, the time they take to reach the ground, the moment when they hit the ground, and their speeds when they hit the ground.