Free Fall Calculator

The Free Fall Calculator calculates an object's free fall energy in a fraction of a second, saving you time. If all other related characteristics are available, this helpful tool can quickly calculate the velocity and distance covered by the falling object.

Gravitational acceleration (g):
Time of fall (t):
Height (h):

What is meant by free fall?

The term "free fall" refers to when an object moves under the influence of gravity. Gravitational acceleration is the only force acting (g). On such objects, there will be no air friction. A free-falling object does not have to fall all of the time. The moon is one such instance.

The motion of the moon fits all of the criteria for a free fall, yet it does not fall because its speed is not directed towards the earth. Instead, the moon moves with cosmic velocity and creates a centrifugal force that is equal to and opposing the force of gravity.

Free Fall Speed

The velocity of a free-falling object can be written as v = v₀ + gt using the definition of velocity.

  • Where: V₀ = initial velocity and is measured in m/s, and f/s
  • t = fall duration and is measured in seconds.
  • g = free-fall acceleration measured in m/s^2 or ft/s^2.

Without air resistance, the gravitational acceleration would be roughly 9.80665 m/s or 32.17405 ft/s. The velocity of a falling object is determined by another velocity known as terminal velocity.

What is Terminal Velocity?

The gravitational force applied on an object is constant because the Free Fall Acceleration is constant. Air resistance usually increases as free-fall speed increases. Both forces will have equal amplitude at some point. According to Newton's First Law, a falling item will eventually cease accelerating and proceed at a steady speed called terminal velocity.

Equations of a Falling Body

You must first put out the equation of motion to calculate the distance travelled by a free-falling item. The equation will be as follows if the starting displacement is set to zero.

s = (1/2)gt²

If the item has a starting velocity, we must account for that as well, and the equation is as follows s = v₀t + (1/2)gt²

The distance travelled by the object is proportional to the square of fall time, as shown by the equation. As a result, the falling body will go a greater distance per second than before. We can deduce from the Free Fall Formula that distance is unaffected by the falling object. If you throw a feather and a brick at the same moment, they will both hit the ground.

How to use the Free Fall Calculator?

The following is the procedure how to use the free fall calculator

  • Step 1: Enter the unknown value of time of fall, height, velocity and x in the appropriate input fields.
  • Step 2: To acquire the result, click the "Calculate the Unknown" button.
  • Step 3: Finally, the output field will show the object free fall energy.

For more concepts check out to get quick answers by using this free tool.

Free Fall Examples

Question 1: If an object is hurled at a speed of 8 m/s, It takes 10 sec to travel and return to the earth. Calculate the speed of free fall shortly before you hit the ground?



Initial Velocity (v₀) = 8 m/s

Time taken (t) = 10 seconds

Free fall speed v = v₀ + gt

Because time is measured in seconds, we must convert 300 km/h to m/s.

By inserting the input values, we arrive at the following equation.

v = 8 + 9.80665 x 10

v = 106.06 m/s

Question 2: If a body takes 8 seconds to fall and has an initial velocity of 12 m/s, calculate the distance travelled in free fall.



Initial Velocity (v₀) = 12 m/s

Time taken (t) = 8 seconds

The formula for calculating distance is as follows: s = v₀t + (1/2)gt²

By inserting the input values in the distance formula, we get the following equation.

s = 12 x 8 + (1/2) x 9.80665 x 8²

We can get the distance by simplifying it, even more, s = 409.81m

FAQs on Free Fall

1. What's the difference between weightlessness and free fall?

When an object is in free fall, it is only impacted by gravity, however, when an object is weightless, it does not weigh because gravity does not affect it (it still has mass). Weightlessness can be attained in space or by applying an equal force in the opposite direction of gravity.

2. Does Free Fall have any acceleration?

Because the gravitational force is always constant and acts downwards, free fall has a constant acceleration.

3. Does a free-falling body's weight alter its speed?

The speed with which an object falls is unaffected by its weight. When two identically shaped items of different weights are thrown at the same moment, they will both touch the ground at the same time.

4. What affects free fall?

As a result, a range of elements influence falling, with the surface area, angle, and weight of the object being the most controllable. Parachuting and freefalling are feasible thanks to the combination of these controls and physics principles.

5. When a person is in free fall, why does he or she feel weightless?

We don't feel weighed down because we're not being pushed or pulled in any direction. The force of our feet on the ground and the ground against our feet is what makes us feel 'weighted' when we're standing on the ground.