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Which type of surface will produce the fastest race time? Concrete, sandpaper, or gravel?
If I race a remote control truck on a concrete, sandpaper, and gravel surface, I think the truck will go faster on the concrete surface.
1. Gather all of your materials.
2. Using your measuring tape, measure 12 ft in distance from the starting point to the finish line. Make sure your area is flat and dry.
3. Stick pieces of tape at the beginning and end of your track to form a clear start and finish line on concrete.
4. Place your toy truck in the start line.
5. Look at the three different surfaces you will test: the concrete, sandpaper and gravel. Rub your finger against each one. Which one is the smoothest? Which one is the roughest?
6. Have your helper prepare the stopwatch and count you down from three. When she reaches one, she should start the stopwatch and you should use the remote control to race your truck to the finish line.
7. Have your helper stop the stopwatch as soon as the truck speeds across the finish line.
8. Record the time in your notebook.
9. Now lay sandpaper on the concrete with the same measurements.
10.Place the toy truck at the starting line.
11.Drive the truck through the sandpaper surface with your helper timing the race again.
12. Record the time in your notebook.
13. With adult supervision, place your truck in a gravel road with the same measurement of 12 ft from starting to finish.
14. Drive the truck through the gravel road with your helper timing the race again.
15. Record your time in your notebook.
16.Study the different race times. What are your conclusions?
The truck moved faster on the smooth concrete, and much slower on the sandpaper and gravel surfaces.
My hypothesis was right, the concrete was the best surface to use to determine the fastest time. The concrete had a smoother surface causing the truck to flow easy, while the sand paper and gravel had a
If I race a remote control truck on a concrete, sandpaper, and gravel surface, I think the truck will go faster on the concrete surface.
1. Gather all of your materials.
2. Using your measuring tape, measure 12 ft in distance from the starting point to the finish line. Make sure your area is flat and dry.
3. Stick pieces of tape at the beginning and end of your track to form a clear start and finish line on concrete.
4. Place your toy truck in the start line.
5. Look at the three different surfaces you will test: the concrete, sandpaper and gravel. Rub your finger against each one. Which one is the smoothest? Which one is the roughest?
6. Have your helper prepare the stopwatch and count you down from three. When she reaches one, she should start the stopwatch and you should use the remote control to race your truck to the finish line.
7. Have your helper stop the stopwatch as soon as the truck speeds across the finish line.
8. Record the time in your notebook.
9. Now lay sandpaper on the concrete with the same measurements.
10.Place the toy truck at the starting line.
11.Drive the truck through the sandpaper surface with your helper timing the race again.
12. Record the time in your notebook.
13. With adult supervision, place your truck in a gravel road with the same measurement of 12 ft from starting to finish.
14. Drive the truck through the gravel road with your helper timing the race again.
15. Record your time in your notebook.
16.Study the different race times. What are your conclusions?
The truck moved faster on the smooth concrete, and much slower on the sandpaper and gravel surfaces.
My hypothesis was right, the concrete was the best surface to use to determine the fastest time. The concrete had a smoother surface causing the truck to flow easy, while the sand paper and gravel had a