Monday, November 9, 2009

Slopes & Functions

This week in science we worked on finding slopes and writing functions. If a man is walking at 4 meters in every 2 seconds and he starts at 0 for position, where will he be after 10 seconds. The slope would be position over time, so 4/2 and the slope (or speed) is 2 meters per second.The function to answer the question would be x(t)=2(m/s)*t. To solve it you put in 10 for t. x(t)=2(m/s)*10. The answer for x would be 20. So, at 10 seconds the man would be at 20 meters.

Sunday, November 1, 2009

Science; Motion Is Relative

Hey everyone! This week in science class was very interesting, and I feel like I can understand the world around me a little bit better. We have been learning about motion for the past week, and how some things can appear to be moving in different directions for different observers depending on their position and/or if they are in motion themselves. For example, if the observer is moving at the same direction and pace as the object, it will not appear to be moving. But, if someone else is standing completely still, the object will be moving to them. To test this, one student, Laura, stood on a desk. For all of us that were sitting in out seats, she was not moving. To Mr. Segen, who was walking across the room, it looked like she was moving. This is why motion is relative to the observer.