* A toy car with metal wheels
* A magnet
* A piece of cardboard
* A ruler
* A stopwatch
Procedure:
1. Place the toy car on the cardboard.
2. Hold the magnet near the car.
3. Observe how the car moves.
4. Measure the distance the car travels in 1 second.
5. Repeat steps 2-4 for different distances between the magnet and the car.
Observations:
* The car will move towards the magnet.
* The closer the magnet is to the car, the faster the car will move.
* The farther the magnet is from the car, the slower the car will move.
Explanation:
The magnet creates a magnetic field. The metal wheels of the car are attracted to the magnetic field. This attraction causes the car to move towards the magnet.
The strength of the magnetic field decreases as the distance between the magnet and the car increases. This is why the car moves slower when the magnet is farther away.
Applications:
The principle of magnetic attraction is used in a variety of applications, such as:
* Electric motors
* Generators
* Magnetic resonance imaging (MRI)
* Magnetic levitation (maglev) trains
