Blog Post #6

It's me again with another blog post.  So, after about three weeks, we are finally on another unit.  Today I will be showing you all about vectors (or at least what we learned so far).  Vectors are basically the direction and what magnitude something goes.  Magnitude is just how far something goes at a certain direction.  The picture I posted is of my sister holding an arrow that reads vector.  The arrow represents a vector because it points at what direction it travels.  If we were to measure the arrow, we could also measure the magnitude.  For example, if the arrow was about 3 inches and the scale reads 1inch= 4miles we can tell that we went a distance of 12 miles to the left (or west if we were pointing in cardinal directions).  So that is just the basics of vectors.  So I hope you learned something today about both magnitude and vectors.

Blog Post #5

Hey this is me again with another post on kinematics.  This week I'm talking about tossing objects in the air.  This has to do with velocity and acceleration.  My friend (who I shall not name), is tossing a Gatorade bottle in the air, and then caught it. We did a similar exercise with a ball for a lab this past week.  Anyways, when you toss an object in the air, the object would have the same velocity going down, but would go in the negative direction.  So, for example, if he throws the bottle in the air at a velocity 9 m/s, then the bottle will drop at the same velocity, but in the negative direction.  Therefore, the bottle will drop -9 m/s.  One more thing.  If when dealing with velocity, when the object is thrown up and then drops back down, the speed goes fast, slow, stop, slow, then fast.  So when graphed on a distance vs. time graph, it will show up as a parabolic shape.  And when graphed on the velocity vs. time graph, it will show up as a kind of diagonal line going in the negative direction.  This is because when the object is going up, it will go fast, then slow, then stop, so when it stops, it will hit the zero line on the graph.  Then, when the object is dropping, then the object will start to accelerate again but this time the line will go stop, then slow, then fast.  So it basically when in a straight line.  So there you have it, velocity/acceleration in a nutshell.

Blog Post #4

Hey, so today's blog post is still on kinematics.  So for those of you who have not gotten what kinematics is yet, its the study of motion.  Today, I will talk to you about acceleration.  Acceleration is the change of velocity per unit of time.  This means simply that the velocity changes when time increases.  The video I posted is of gravity or ag.  This is basically the acceleration of gravity.  Gravity accelerates at a rate of 9.8 m/(s^2).  The ball is used as a representation of gravity in which the ball accelerates as it bounces.  When it bounces, the gravity weighs down on it till it hits the ground and bounces till it stops.  Therefore, it demonstrates acceleration.

Blog Post #3

Hello again, I'm doing another post on kinematics.  I believe I defined kinematics on my last post but for those who have not seen the last one, it is the study of motion.  This time, I want to talk to you about velocity.  Velocity is basically how fast and which direction you are going.  As you can see, the person in the picture is demonstrating velocity at a cross country meet.  See cross country meets are basically a set course with which you run at a certain rate, at a set direction.  When you change direction, you change velocity.  So, in conclusion, he did indeed demonstrate velocity.