By Ed Sobey
How does a radio-controlled motor vehicle paintings? writer Ed Sobey courses readers as they take aside and rebuild their very own radio-controlled vehicle. within the procedure readers also will find out about radio waves, acceleration, towing capability, battery voltage, and extra! Many experiments comprise rules you should use on your personal technological know-how reasonable tasks.
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Extra resources for Radio-Controlled Car Experiments (Cool Science Projects with Technology)
Example text
At the same time, have your friend start the stopwatch. 4. When the car comes to a complete stop, have your friend stop the watch and record the elapsed time. 5. Repeat these steps several times to ensure that you are getting consistent results. 6. 3) by the time it takes the car to come to rest. This is an estimate of the car's deceleration. It is a measure of how quickly the car goes from full speed to stop. Record this estimate for deceleration. Note that the units will be velocity/time. For example, if you measured speed in feet per second, deceleration would be feet per second per second, or feet per second squared.
One way to measure the speed of a car is to use a radar gun. Toy radar guns (Figure 14) are available from Mattel® Hot Wheels® in stores or online. They are designed to be used with Hot Wheels® vehicles, so they will work well with your R/C car. 2. For the radar gun to get an accurate measure of your car’s speed, you will need to drive the car along a straight line for several seconds. 1. On a smooth surface, such as a wood floor or paved tennis court, create a straight line of masking tape that is at least 6 meters (20 feet) long.
How could you find out? An easy way to increase the length of the antenna is to attach one or more alligator clip leads. 1. Clip one lead onto the antenna (see Figure 15). What impact does it have on the range? 2. Try clipping a second lead onto the end of the first lead. Does that cause an additional increase in range? 3. Try shortening the antenna by pushing it to its most compact position on the handheld controller. Now test the impact of adding one or more clip leads. If you do not have clip leads, try pieces of wire about 3 cm (12 in) long.