Today in class we learned about kinematics. Kinematics is the study of motion. ALL MOTION IS RELATIVE.
In the picture on the left, the car is going faster than our car. The car is moving forwards relative to our car.
In the middle picture, our car and the car portrayed are moving relative to the ground. But, relative to our car, the other car seems to not be moving because we are driving side by side.
In the picture on the right, the car is going slower than our car. The car is moving backwards relative to our car.
Another situation that happens with cars is cars driving from the opposite direction. On the freeway the cars driving on the other side of the road seem to be going very fast as they past. This is because the car is also moving at a fast rate so the speed at which you past is doubled.
We also learned about the scalar quantity and the vector quantity:
Scalar quantity - measure that has magnitude (muchness) distance
Vector quantity - value that has direction & magnitude displacement
The slope of a position vs. time graph is velocity.
Velocity = d/t = average speed
Instantaneous speed - the speed at which you are going at any instant time
Jantzen, I really like your pictures. You have a lot of good detailed information. I like how you talked about "speed" and how you used the cars as an example to teach us about speed and how speed depends on the object and what it is relative to. You chose a very good photo and went over everything we learned. Great Job!
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