I wasn't there, so I have no knowledge of how things were set up in that particular
experiment. The only force I'm sure of is the force of gravity, and your use of the
term "dropped" seems to confirm that assumption.
There are many forces acting on a body. But, the moves because of the net force acting on it. So, we can say that the body accelerates because of net force acting on it only.
Its a reaction force, and is equal and opposite to your force, only it is acting on different objects, so the force is still unbalanced.
All objects on earth have the force of Gravity acting on them.
Your weight. Weight is the definition of the force between the earth and other objects. Thus you weight is the gravitational force acting on you from the earth.
Without the interference of air or any other force, they should fall at the same speed. All objects accelerate at the same rate regarding their masses. To conclude, If this was made in a vacuum they should fall at the same speed but in different conditions it may have different results due to air resistance.
When a hollow plastic ball and a solid metal ball is a dropped in a vacuum and gravity is the only force acting on the balls the balls will fall at the same rate. Being that this is a prediction answer may vary.
Objects will accelerate if there is a net force acting on them.
A Vacuum.
the force is not in the direction of the objects motion.
gravity
Friction
It moves in the direction of the force acting on it.
Not balanced. The net force acting on the object is not zero.
nuclear force,gravitational force,magnetic force and adhesive and cohesive force
zero net force
Objects moving at constant speed in a straight line are said to be in equilibrium. That is there is no force acting on them. If a force was acting there would be aceleration and the velocity would change.
The masses of the two objects and the distance between the two objects affect the gravitational force between them.