Question

What force(s) were acting on the objects dropped in the air (normal mode)? What force(s) was acting on the objects dropped in the vacuum?

Answer 1

Gravity and air resistance forces were acting on the objects dropped in the air (normal mode).

Gravity force was acting on the objects dropped in the vacuum.

Answer 2

For 1st Question:

There are two main forces acting on objects dropped in the air in normal mode:

• Gravity: The force of gravity pulls objects towards the center of the Earth. This is the force that causes objects to fall.
• Air resistance: Air resistance is the force that opposes the motion of an object through the air. It is caused by the friction between the object and the air molecules.

For 2nd Question:

In a vacuum, there is no air resistance, so the only force acting on objects dropped in the vacuum is gravity

The force acting on objects dropped in a vacuum is the force of gravity, which is equal to the object's mass multiplied by the acceleration due to gravity.