Start your presentation by defining what you are talking about: free fall.
Free fall...when an object moves through the spatial dimensions under force of gravity and no other forces with one possible exception, air resistance.
So this exempts a glider, for example, because it has wings and lift forces. And it exempts anything, like a rocket, that is self-propelled. That's another force other than gravity and air resistance. But a person descending without a parachute is in free fall because gravity is pulling him downward while air resistance is pulling upward. Or a Baseball in a trajectory is in free fall because while in flight, and if we discount the minimum air resistance, only gravity acts on the ball as in comes back to Earth after passing over the fence for a home-run.
Notice that free FALL does not necessarily mean the object is falling all the time. In the baseball case, the ball clearly rises for a bit before it starts back down. Nevertheless, it is in free fall the whole trajectory as it's acted on only by gravity (discounting air resistance).
Then show day to day cases where free falling objects are found. For example, when playing ball (any of them), those balls while in the air are in free fall. You might go high tech and point out that satellites go into free fall when they re-renter the Earth's atmosphere and burn out. Not the shuttle, though, it develops lift. You might also point out that when the free falling parachutists pops his chute, he is no longer in free fall as most if not all chutes also develop lift and the chutist uses that lift to guide himself to a safe landing spot.
The object is said to be in free fall.
The only force that can act on an object in free fall is gravity.
An object moving horizontally, an object resting on a surface, and an object in space with no gravitational force acting on it are not examples of free fall. Free fall specifically refers to an object falling solely under the influence of gravity.
The two states that exist when the only force acting on an object is gravity are free fall and equilibrium. In free fall, the object is accelerating downward due to gravity, while in equilibrium, the object is either at rest or moving at a constant velocity with no net force acting on it.
An object in free fall is accelerating, so the forces on it must be unbalanced.
The object is said to be in free fall.
An object is in free fall when only gravity and air resistance (drag) are acting on it. In space, free fall excludes drag.
An object in free fall is one that has only the force of gravity acting upon it.
A falling object.
The only force that can act on an object in free fall is gravity.
An object moving horizontally, an object resting on a surface, and an object in space with no gravitational force acting on it are not examples of free fall. Free fall specifically refers to an object falling solely under the influence of gravity.
The two states that exist when the only force acting on an object is gravity are free fall and equilibrium. In free fall, the object is accelerating downward due to gravity, while in equilibrium, the object is either at rest or moving at a constant velocity with no net force acting on it.
free fall
An object in free fall is accelerating, so the forces on it must be unbalanced.
In free fall, the force of gravity alone causes an object to accelerate in the downward direction.
What you're referring to is actually "an object in free fall" not "free for all". An object is in free fall when the only force opposing gravity is potentially the force of wind friction as the object is pulled to the ground (see Terminal Velocity).
What you're referring to is actually "an object in free fall" not "free for all". An object is in free fall when the only force opposing gravity is potentially the force of wind friction as the object is pulled to the ground (see Terminal Velocity).