A freely falling object is one that moves solely under the influence of gravity, with no other forces acting on it (such as air resistance).
What is the distance fallen for a freely falling object 1 second after being dropped from a rest position? What’s the distance after a 4-second drop?
After 1 second, a freely falling object has fallen about 5 meters; after 4 seconds, it has fallen about 80 meters (using g = 9.8 m/s²).
These numbers come straight from the free-fall distance formula d = ½ g t². Plugging in t = 1 s gives ½ × 9.8 × 1² ≈ 5 m. At t = 4 s you get ½ × 9.8 × 16 ≈ 78.4 m, rounded to 80 m in most textbooks. If you need a more precise value, keep the extra decimal and report 78.4 m instead.
What does it mean for an object to be freely falling?
An object is freely falling when gravity is the only force influencing its motion—air resistance must be negligible.
In everyday terms, imagine dropping a bowling ball and a feather inside a vacuum chamber. Because there’s no air to slow the feather, both hit the ground at the same instant. That’s free fall in action. The motion follows Newton’s second law (F = ma), where the net force is simply the object’s weight (mg).
How does Quizlet define free fall?
Free fall is the vertical motion of an object when the only vertical force acting on it is gravity.
On Quizlet you’ll often see this defined alongside terms like “mass” and “acceleration due to gravity.” The key point is that “free fall” is a label for motion driven exclusively by gravity, not by engines, ropes, or air pressure.
How much does a freely falling object’s velocity increase each second?
A freely falling object gains approximately 9.8 m/s of speed every second—this is the acceleration caused by Earth’s gravity.
Start at rest: after 1 s you’re moving at 9.8 m/s downward; after 2 s you’re at 19.6 m/s, and so on. The value is often rounded to 10 m/s² for quick estimates. Notice that the same 9.8 m/s² also slows an object thrown upward at the same rate it speeds one falling downward.
When does an object fall freely?
An object falls freely when it is influenced only by gravity, with no significant air resistance.
Practical conditions that approximate free fall include dropping an object in a vacuum chamber, an astronaut training in a “vomit comet” airplane, or a satellite orbiting Earth once its engines are off. In each case, the only force acting is gravity.
What forces act on an object in free fall?
The only force acting on a freely falling object is gravity.
If you’re inside Earth’s atmosphere, you’ll feel air drag once your speed builds up, but that drag is deliberately excluded when we say “free fall.” In space or vacuum, the net force vector is simply the object’s weight (mg).
How long does it take for an object to fall a certain distance?
Time to fall depends on the height and the acceleration due to gravity; for example, a 20 m drop takes about 2 seconds.
Use the equation t = √(2h/g). For h = 20 m and g = 9.8 m/s²: t ≈ √(40/9.8) ≈ 2.02 s. The same formula works for any vertical drop—just swap in the real height.
How do you calculate the distance an object falls in free fall?
Free-fall distance is s = ½ g t², where g ≈ 9.8 m/s² and t is the fall time in seconds.
Need the distance for 3 s? Plug in: ½ × 9.8 × 9 ≈ 44.1 m. If you only know the height and need the time, rearrange to t = √(2h/g) and solve numerically or with a calculator.
How do you calculate the speed of a falling object?
Falling speed is v = g t, so after 5 s an object is moving at about 49 m/s downward.
Velocity grows linearly with time. After 10 s you’d hit 98 m/s (≈ 220 mph). For upward throws, use v = v₀ – g t; the sign keeps track of direction automatically.
How should Hector fix his free-fall diagram?
Hector should make the “Path” arrow curve downward to show the object accelerating under gravity.
In a free-fall diagram, the trajectory is a parabola (or a straight vertical line if launched straight up). Any straight-line path drawn horizontally or at constant spacing is incorrect.
What’s true about an object in free fall according to Quizlet?
An object in free fall changes its velocity by the same amount each second—about 9.8 m/s every second.
The statement “accelerates at 9.8 m/s²” is only true when gravity is the sole force. That constant acceleration produces equal velocity changes per second, which also results in equal distance changes per second squared.
What’s the acceleration of an object in free fall according to Quizlet?
The acceleration of a free-falling object is 9.8 m/s² downward on Earth.
This value is often labeled “g” in equations. It is constant near Earth’s surface and is the same for every object regardless of mass, provided air resistance is negligible.
Does a freely falling body have constant velocity?
No—a freely falling body does not have uniform velocity; its velocity increases steadily at 9.8 m/s every second.
Uniform velocity would mean the speed stays the same. Instead, the object’s speed grows linearly with time, so its velocity is definitely changing.
Can you give some examples of free fall?
Common examples include a stone dropped down a well, a satellite in orbit once its engines shut off, and the descent phase of a projectile.
- A spacecraft in continuous orbit (engines off)
- A stone dropped down an empty well
- An object on its descent during projectile motion
All of these situations approximate motion under gravity alone once other forces are removed.
How does the velocity of a freely falling body change over time?
The velocity of a freely falling body increases uniformly by about 9.8 m/s for every second of fall.
Start at zero speed; after 1 s you’re moving at 9.8 m/s, after 2 s at 19.6 m/s, and so on. The steady 9.8 m/s² rate of change is what makes the velocity graph a straight line sloping downward.
