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FAST FALLING OBJECTS

Learn about the speed of various falling objects

Suitable For

Grade 3

Difficulty

1

Time Required

 <12 Hours

Supervision

Advised

What’s it about?

One of the forces of nature which can be studied easily is the earth’s gravitational force or ‘gravity’. Gravity can be explained as the force with which the earth attracts bodies near its surface. Gravity causes a falling object to hit the ground with a thud. The greater the height from which an object falls, the bigger the thud as can be seen in the following science experiment:

Topics covered

Gravity, Isaac Newton, Terminal velocity

What will I need?

  • LARGE TIN TRAY
  • CHAIR
  • BALL BEARING
  • MODELLING CLAY
  • RULER

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

The science experiment works because objects that fall from a greater height are travelling faster when they reach the ground, than objects falling only a short distance. This is why the same object dropped from the highest point, makes the largest dent in the clay. A falling object dent the ground if the ground is of a softer substance than the object, whereas a soft object can be damaged by the ground if it falls on a surface that is harder than the object.

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