.r.a.c means a company that I made. It also means "Riley Adam, Cici." .r.a.c made two solar-powered cars.
We made cars before, but this car is different because there is no battery (or switch). Instead, the car has a solar cell that gets energy from the sun. So if you put in car under the sun, the car will move until it goes into the shade.
The solar cell changes the sunlight (a kind of energy) into electricity (a kind of energy). The electricity makes the motor move (another kind of energy). There is a gear with the motor and the axle to make the car go. The gear is a kind of machine that gives us mechanical advantage that we talked about last week.
In this video, we can see .r.a.c testing the car. The car goes in the sun, then stops when we put a shadow on it. .a (Adam) said it was a race, but .r (Riley) said it's not a race because we're just testing them. .r thinks this kind of boy always want to race. And she also thinks that this kind of boy always wants to win.
Solar-powered cars have both pros and cons.
Pros
- They don't waste energy
- Don't need to carry a battery
Cons
- Can't drive at night.
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