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Free fall #1


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This simulation provides time-lapse of a free fall on a background of the historical reference to Galileo's experiment (1564 - 1642) which took place according to legend in Pisa in 1602.The free fall experiment of Galileo (1564 - 1642) revealed the uniform acceleration of a ball as it falls.

A ball is released without initial speed from the top of the tower. For the physical model of free fall, it is agreed that any force other than gravity is ignored / overlooked. This simulation, like the work of Galileo, ignores any frictional or buoyant forces.

The photographs are taken at equal time intervals. The distances between each shot are used to study the increase in speed over time. This is uniformly accelerated motion.

Press 'play' to make the ball fall and 'pause' to stop the fall.

Rollover the balls to get the time intervals.

Click on [print] to print the current image.

Learning goals

  • To study the free fall of a body.
  • To establish a table of values and calculate the average velocity at different times.
  • To show that the acceleration is constant (9.8 m.s-2)


Learn more

Chronophotography of a movement allows the position of the moving body to be known for different times, and the average velocity to be derived.

Ex:  Here are time (t) and distance (y) values for…

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