Sorry guys it took me so long to post these for you, my Internet at my place has been out all evening until right now. Today we discussed about our lab with the rockets.
The rocket lab dealt with projectiles and we discovered that the angle the projectile is shot at will determine how far it will travel. In the second class I gave the example of how I enjoy snowboarding and the angle of the jump will determine the flight of me off a jump. In the picture below you will see what I am talking about.
The rocket lab dealt with projectiles and we discovered that the angle the projectile is shot at will determine how far it will travel. In the second class I gave the example of how I enjoy snowboarding and the angle of the jump will determine the flight of me off a jump. In the picture below you will see what I am talking about.
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| Photo courtesy of ArisPhoto.com |
This is exactly what happened in our experiment and we talked about how we would improve our experiment next time so that there would only be one variable, which would be length of the rocket. If we made a machine or used a protractor to ensure that all rockets were launched at the same angle our test would be much more concrete.
Another point was the amount of force each rocket was given and that could be better controlled by having the same person blow every rocket because it would give a better chance for the rockets to receive the same amount of force.
Today we reviewed some terminology from before to make sure everyone is on the same page. Some key terms include...
Mass - the amount of stuff there is of something.
Force - this refers to a push or pull of an object. Force is always referred to in Newtons and is always given a direction in which the force is acting.
Net force - this is the total amount of force acting on a single object. So in the force diagram below the net force is zero because there is 5 N of force pulling from the left side and 5 N of force pulling from the right side, thus they cancel each other out.
But when the net force does not equal zero like in the diagram below, the object will always move in the direction of the larger force. So for this example the box will move to the right with a force of 2 N because it is being pulled in that direction with 2 N more force.
Speed - How fast something is traveling. The formula for speed is S = d/t.
Velocity is just the term for speed in a given direction. For example, someone's speed would be 25 mph on Lake Shore Drive but that could easily be turned into velocity by adding a direction so 25 mph North on Lake Shore Drive.
Acceleration - This refers to the change in speed over time. The formula for acceleration is A = change in velocity/t
We will cover more on acceleration tomorrow and go further into Newton's 2nd Law - F = MA.
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