"What I learned in 1st Semester"

This semester I learned a lot!! The first unit we learned about was Kinematics (1-dimensional and 2-dimensional).  I learned that kinematics is the study of motion.  This is the basics of physics.  After we learned about kinematics, we learned a little bit of graphing that goes deals with kinematics.  The next unit was Forces and Motions. In this unit I learned Newton's 1st, 2nd, and 3rd laws of motion.  I learned that a newton is in units of kg m/s^2 and that weight = mg. Also in this unit we learned about pulleys and because it has one string, that means there is one tension.  Momentum was the next unit we learned about.  I learned taht momentum is a vector that is calculated by multiplying mass times its velocity (units: kg m/s). The law of conservation of momentum is that momentum cannot be created nor destroyed, it can only change forms, so therefore, momentum in equals momentum out.  Similar to this law of conservation, I learned about the law of conservation of energy which basically stated that energy in equals energy out, in the our unit of Work and Energy.  I learned much information this semester and many equations.  All this information and knowledge I learned was written down in my physics notebook so that I will never forget. :)