In this lab, we rubbed the balloon with animal fur, then stick the balloon to the glass cabinet. by the experiment, we predicted that the balloon will stick in the glass because the balloon is charged by the animal fur with negative charge , and there is positive charge on the glass, they can be stick together.
If we peel two tape off the table and bring the non-sticky side of it toward each other, the tape will repel each other. The closer they are, the larger distance they will repel. And different side of tape to close to each other,
At the beginning of this experiment, we predicted that The relationship between force and distance r is inversely proportional.
The FBD about suspended ball.
By using LoggerPro, we find a graph that shows the relationship between electron force and distance, and find the values. In the lab, the theoretical value is 2, and our experimental value is 1.999. It is very close to it. The reason why it is not exact 2 is because we some times click the point not at the middle of the ball.
If two charges have same charge, then they will repel. If they are opposite signs, they will attract to each other.
The Van De Graff generator can charge other objects.
Professor Mason places a wig above the Van De Graff generator. the hair is sticking up. That is because the generator puts charges into the wig, then all the charges are same, they want to repel each other.
Then, Professor Mason puts a Franklin motor above the generator. then the Franklin motor immediately spins because the charge accumulated at the points. It is a conservation of momentum situation, the electrons streamed out of those points and moved the entire system.
No comments:
Post a Comment