Give an example of an object that is in free fall.

An object is said to be in "free fall" if the only force acting upon it is gravity.

(1) A satellite orbiting the Earth is said to be in free fall.

(2) The astronauts in a space station are in free fall (as is the space station itself). The only force acting on the astronauts is gravity.

(3) If we neglect air resistance, a skydiver is in free fall until they pull their chute.

(4) If you drive fast over the top of a hill and the car loses contact with the pavement, you and the car are temporarily in free fall (again neglecting air resistance).

(5) The planets are in free fall as they orbit the sun.

The reason astronauts in the space station (or passengers in the so-called "vomit comet" during the downhill phase) perceive weightlessness is that the force of gravity is opposed by the inertial motion of the vehicle.