week 3 science 2

The big question addressed in lab, and a description of what you did.

We addressed how to interperet motion graphs. The big question was what affects a rider's speed down a slide? 

When testing this question, there are different variables to consider/test like slide material, steepness, initial push, weight, temp, wet/dry slide, running start... etc. 

Does the weight of a rider affect the speed as they go down the slide? 

A description of what you learned in Thursday's lecture

In lecuture, we learned about acceleration=change in velocity/time

acceleration often gets confused with speed, however, it is different 

a question we looked into was WHY do riders accelerate as they slide? 

Accelerate in 3 different ways

Forces have a magnitude (size) and a direction 

Friction depends on...

- types of surfaces 

- how hard the surfaces are pushed togehter

Answer questions about the weekly textbook reading: 

What did you learn? 

I learned that even if an object is not moving, there are still forces applied at all times. The example the book provided was a book on a table. Although the book is not moving, the book puses down while the table pushes it up. 

What was most helpful? 

++The idea that a force does not just appear by itself, another object needs to be acting on it++

Sometimes I think forces just happen, however it needs to involve another object enacting the force. 

What do you need more information on?

More information on net force would be helpful, I remember learning about it in high school physics, however, I still do not fully understand it. 

What questions/concerns/comments do you have?

How heavy does an object have to be in order for the force to be apparent? Like the book example, what other factors effect the book on the table? How fast the books are thrown on the table?