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Does using a swimming cap make a swimmer swim faster?Featured science projectScience project video

Materials

The materials required for the experiment are as follows:

-    20 swimmers aged 15: 10 boys and 10 girls
-    an olympic size swimming pool
-    20 swimming caps
-    10 stopwatches
-    10 assistants

Procedure

1.    For this experiment, whether the swimmers swim with or without a cap is important, is the independent variable. The dependent variable is the amount of time the swimmers take to swim 100 meters. Measure this using a stopwatch. The constants (control variables) are to be the participants’ age, the distance they are to swim (100m), and the temperature of the water in the pool.

2.    Before the start of the test, participants are to wearing their swimsuit, shower and warm up. Then, they are to start swimming.

3.    Engage 10 assistants to record the amount of time the swimmers take to swim 100m. Each assistant is to take charge of 1 male and 1 female swimmer, and measure the amount of time they take to swim 100m.

4.    Participants are to first swim without caps. 10 boys are to swim first. Line them up in their starting positions. The assistants are to start the stopwatch when the whistle is blown. They are to stop the stopwatch once the participants complete to 100m and to record the participants’ timings in the table below.

5.    10 girls swim next, without wearing caps. Line them up in their starting positions. The assistants are to start the stopwatch when the whistle is blown. They are to stop the stopwatch once the participants complete to 100m and to record the participants’ timings in the table below.

6.    Let the participants rest for at least 2 hours. Repeat procedures number 4 and 5, but have the participants wear swimming caps.
 

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Complexity level:
4
Project cost ($):
120
Time required:
It will take an hour to set up the experiment, and 3 hours to conduct it.
Material availability:
The swim caps can be purchased from a sports store.
Safety concerns:

Ensure that all of the participants are confident swimmers and have a life-guard on standby at all times.