Describe how you slowed the speed of the marble.
We slowed down the speed of the marble by enforcing the turning points of the straw with tape, increasing friction between the marble and the track. We also placed small plasticine speed bumps
along the track.
How long did your marble take to roll to the bottom of your design?
13s
What was your most difficult problem you had solving this Challenge?
Having the marble roll smoothly down the track without stopping.
What parts of your design pleased you most?
The plasticine bumps. They served to increase friction between the marble and the track and also to slow the marble down further.
How might your design be improved?
It might be improved by lowering the gradient at which the board was tilted or increase the friction between the track and the marble so as to slow the marble down even more.
Can you think of three types of guiding structures? Draw them and write short descriptions.
Give three examples of other kinds of kinetic energy. Make drawings and write descriptions.
Describe gravitational energy in your own words; how it works, why it is important, and what would happen if there wasn't any gravity on earth.
Gravitational energy is the energy that draws a smaller object towards a larger object of greater mass. Objects with a greater mass have stronger attractive forces than smaller objects, this attractive force is called gravity. If there wasn't any gravity on Earth, everything will be floating around.
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