In physics, dynamics is the study of forces (why objects move). When studying dynamics, vectors are used to describe forces. Vectors are often identified with arrows. The longer the vector is, the stronger the force is.When vectors are collinear, the magnitudes are simple added while keeping the direction. When the vectors are not parallel, simply subtract the smaller magnitude from the larger and use the direction of the longer. Vectors can also be described using components (x part, y part). The components of a vector are two perpendicular vectors that would add together to yield the original vector: - Components are notated using subscripts.When finding the resultant vector using vector components, square, sum and square root the components. To find the angle, take the inverse tangent of the y component over the x component. When vectors are not parallel or perpendicular, the only way to add the vectors is by drawing a scale diagram. Forces cause acceleration and have the ability to cause acceleration. -If an object is accelerating, the Net Force is not zero. -To find the Net Force, take the vector sum of all component forces -To find the acceleration, use the equation Fnet=ma. -If forces act at angles, trigonometry is needed to solve.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.