Rocket draws a car with arrows everywhere.
"Energy goes here, turning goes there, and friction stops it!"
Raven asks, "What do you notice is missing?"
Rocket looks. "The seat belts!" Nova glows. "Would you like a hint? Draw the straps."
Go: fuel or a battery gives energy to the engine or motor.
The turning goes to the wheels.
Turn: the steering wheel turns the front wheels.
Stop: brake pads rub a disk. Friction slows the wheels.
Stay safe: seat belts hold people in their seats.
Brake pads use friction to slow the wheels.
Tires use friction too.
Tires grip the road so a car can start, stop and turn.
The grooves in a tire add grip.
Rubbing also makes heat. Rub your hands to feel it.
| Sentence | True or false? |
|---|---|
| The engine or motor turns the wheels. | ? |
| Brakes make the car go faster. | ? |
| Tires need friction to grip the road. | ? |
| Seat belts hold people in a stop. | ? |
Next week, we ride up with the elevator.
We build a cardboard elevator with a counterweight.
Then you put on a Machine Show!
You explained a whole car. Fantastic!
Tomorrow is Machine Day: a go, turn, stop hunt!