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Materials

The materials required for this science fair project are:

-    1 ramp (at least 2 meter long)
-    1 skateboard with changeable bearings
-    5 different sets of skateboard bearing (different brands and prices)
-    Tools required to change the skateboard bearings
-    1roll of measurement tape
-    1 roll of colored masking tape
-    1 long flat surface ( a flat path or basketball court)

Procedure

1.    The independent variable of this science fair project is the type of bearing used on the skate board. The dependent variable is the distance travelled by the skateboard from the ramp. This is determined  using a measuring tape. The constants (control variables) are the elevation of the ramp, the length of the ramp, the surface condition of the ramp and the floor surface.

2.    Purchase five different brands of skateboard bearings. Label them from A to E, from the  most costly to the least costly. An assumption is made that the bearing which is the most costly is manufactured with the greatest precision and is the smoothest.

3.    Fix the ramp on  the floor. Mark a horizontal line using the masking tape, 500m from the top of the ramp. This is  the starting line from which the  the skateboard shall be released.

4.    Mount bearing A on the skateboard. Place the skateboard behind the starting line on the ramp. Release it. Measure the distance travelled by the skateboard using a measuring tape. Repeat this 5 times. Record your results in the table provided below. Repeat Step 3 with the bearings labeled B to E. Record your results in the table provided below.
 

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Complexity level:
5
Project cost ($):
60
Time required:
1 hour for preparation, 1 day for science fair project
Material availability:
Easily found at a skateboard store
Safety concerns:

Basic safety requirements