Week 3 Blog

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 How can we support play that is exciting but not dangerous?

This week in lab we worked with our groups to design and conduct our own investigation. My group chose to investigate how rider weight affects the speed of the rider going down the slide. We ended up testing six different balls. Originally we used a golf ball and a wiffle ball around the same size. The golf ball was way heavier but the differences in the speeds was small. We decided to retest the theory will four balls of the same size but different mass. We tested each ball going down the slide three times and recorded the speed for each attempt. We found the average of all three attempts and then compared the results. We found that the heavier the ball, the faster it went down the slide. When comparing with another group who picked the same topic to investigate, we found that we had similar results. Overall, both groups came to the same conclusion. 



Thursday's Lecture: 

In lecture we learned about velocity, force, and gravity. Forces are always perpendicular just like gravity's force is always pulling down. The force from slides is always pushing straight out. The shallower the slide, the more the force from the slide pushes back up. We also learned about friction and different examples of when friction is caused. 


Weekly Textbook Reading:

This weeks pressbook reading was about forces and Newton's three laws of motion. I learned that forces come in pairs. There are forces acting upon objects even if they aren't in motion too. For example, gravity is always working to keep thing on the ground. Even if I'm not moving or a chair isn't moving for example, gravity and other forces are still working. Overall, this reading reviewed important vocabulary such as friction and inertia while providing an overview of Newton's three laws. 




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