Lifelong Learning Programme

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Experiences

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TEACHERS EXPERIENCES FORM

Title of the Experience
Weightlessness
Name of the teacher
Milena Gosheva
Country where it took place
Bulgaria
School typology
High Secondary School
Thematic Area
Physics
Experience typology
Teaching in class
Type of contact
Direct
Description of the Experience
Theoretical concept:
Weight is the force with which bodies act on the support. When they fall freely they are in weightlessness state. This is because only gravity acts upon them. We can be in such a state when we are in a car passing a convex bridge at high speed, when we jump from a height or descending fast with an elevator.
Model explaining the theoretical knowledge:
State of weightlessness is demonstrated to students as follows: a plastic bottle is filled with water and two holes are made of 7-8 cm from the bottom of the bottle. Water flows out through the holes in a trickle. If we hold the bottle so that the two holes are closed and drop it from high level, we will see that the water does not run out as if someone has plugged up the holes. All parts of the body move with the same acceleration and speed.

Comments on this Teachers Experience

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Date: 2015.01.12

Posted by Lucretia Moruzi (Romania)

Weightlessness is an interesting phenomenon and students are already familiar with it. Needless to say my students have often expressed their interest in the topic. The experiment carried out is simple, to the point and very accessible. I"ll do it and see students' reactions. There are also lots of short films on the internet with astronauts flying in space, which are interesting to watch and discuss with students.

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