drag force (frictional force exerted by air) or air reststance
Earth pulls on the object, and the object pulls on Earth
The question is too vague to answer. What specific situation are you talking about? Three possible answers could be "lift", "nothing", or "the electromagnetic force", depending on the precise circumstances you mean.
It is due to the amount of mass the object has.
Terminal velocity.
isn't in gravity??
Nothing is opposing an object falling to earth. Gravity is causing an object to fall back to earth which is opposing the object from leaving earht. If anything the force that opposes gravity is the force at which an object is projected.
Only if it's falling through air. If it's just the falling object and gravity, then no.
Freefall this means the objects is falling through the air while gravity is pulling.
Air resistance and gravity.
If there is no air resistance, gravity will accelerate the falling object, that is, it will change its velocity.
Gravity is a force that accelerates the falling object towards the ground.
Air resistance
The falling of a parachutist without his parachute deployed will be quite fast. We can slow his decsent by putting a drag on the free fall with a parachute. The fall is no longer free of drag (friction).
Thermal Velocity
Thermal Velocity
The effect of gravity on ANY object - falling or not - is to pull it downward. If the object is in free fall, it will accelerate downwards.
Freefall this means the objects is falling through the air while gravity is pulling.