Unit 3 Picture 2

In unit 3, we learned about acceleration. Acceleration is change in velocity over time. In short, it is meter over seconds squared. For the unit, we had to know 3 crucial equations:

Equations:                  A.K.A

D= 1/2at^2 + v0t        (d,a,t)

V= Vo + at                  (v,a,t)

V^2= Vo^2 + 2ad       (v,a,d)

These equations help us solve for missing information in problems like distance, acceleration, and velocity. Each equation has a purpose to help solve for one of the three missing info. Mr. Blake showed us an effective format to solve problems that involve missing information. We start by writing down the question we are aiming to solve first. Second, we write down all our given information to help us remember what we know, then after, we make a sketch of what the problem is describing. Next we choose an equation that solves for the missing variable and the question at hand. Next we "plug and chug", which is plugging in the given information into the correct equation. Finally we box our answer and go back to check our work.

In class today, we learned about falling objects and how they constantly accelerate. An example we used in class was two falling balls. Even if the balls are different in size and weight, they still fall at the rate (which is 9.8 meters per second squared) due to gravity's pull. In the picture, I am dropping a lacrosse ball and a basketball. As you can see, they are falling at the same rate.

In class we also learned about objects being thrown up and coming back down. We went over how the object on the way up starts fast, then looses speed and goes slow. At a certain point, the object stops and slowly goes down. Eventually it speeds down back to the ground/hand. We learned that the object slowing down when going up is the object starting to accelerate downwards.