PHYS 1201W Chapter 2: chapter 2
Document Summary
In 2d motion, position, velocity and acceleration have magnitude and direction and can be represented by vectors. Choosing a convenient pair of x-y axes are important for solving problems. Vectors are mathematical objects having magnitude and direction and are used to represent many other physical quantities and motions; Adding vectors - order does not matter, add by placing tip to tail. Multiplying vectors - direction of vector being multiplied does not change, length is changed by the factor. Subtracting vectors - the negative vector must be interpreted at the vector equal in magnitude but opposite in direction. Scalars - have no direction and are represented by ordinary numbers. Vector components - vector is broken on the coordinate system, sin, cos, tan are used here to find angles and lengths depending on known info. When speed is constant, the acceleration may or may not be 0.
