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Examining the effect of spring resistance on a radio controlled carís speed Featured science projectScience project video


Materials required for this science fair project:

-    1 XMODS RC car
-    1 XMODS high resistance spring
-    1 XMODS medium resistance spring
-    1 XMODS low resistance spring
-    1 spare battery
-    80 empty soda cans or bottles
-    1 piece of chalk
-    1 measuring tape
-    1 string (10 meters long)
-    1 stop watch
-    1 unused car park area


1.    The independent variable in this science fair project is the resistance of the spring used in the RC car. The dependent variable is the time taken by the RC car to travel 10 meters, which is measured using a stopwatch. The constants (control variables) are the type of car, the surface conditions of the road or track, and the distance that the car travels.

2.    The tests will be conducted using a straight line course of 10 meters and another course that is also 10 meters long but contains a lot corners and turns.

3.    Prepare the straight line course by marking both the start and finishing lines, which are 10 meters apart, using the chalk. Arrange forty soda cans on each side of the course. The width of the course should be approximately 600 mm.

4.    To prepare the course containing the corners and turns, place the 10 meter string on the floor to plan the route of the course. Arrange another forty soda cans on each side of the string to mark the course. The width of the course should also be fixed at 600 mm.

5.    Install the RC car with the high resistance spring. Make five test runs on both courses. Measure the time taken to complete the 10 meter course using the stopwatch, and calculate the average time taken for the five test runs. Record the data in the table given below.

6.    Repeat procedure 5 using the medium resistance spring and the low resistance spring. Calculate the average time taken and record all data in the table given below.

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Complexity level:
Project cost ($):
Time required:
Preparation will take approximately one hour, while observation and recording of data will require one day
Material availability:
Easily found at toy store
Safety concerns:

Safety concerns:Observe proper road safety - never play on an actual road. Find a safe, secluded place (eg. basketball court) to perform your experiment