Physics Exam General Notes 1: Forces and Motion ● ● ● ● ● ● ● ● ● ● Kinematics: study of motion Basic types of motion: o Uniform (constant speed in straight line) o Non-uniform Scalar quantity: with magnitude & no direction o Distance, average speed Vector quantity: with magnitude (arrow above it) & direction (in square brackets after unit) o Position, displacement, acceleration Velocity: o Rate of change of position o Average velocity: displacement divided by time interval for that change o 2-D motion: using GPS (global position system) ▪ N/S/E/W to communicate directions ▪ Ex: 5.0 cm [25° S of E] or [E25°S] Acceleration: rate of change of velocity V-t graph to find other things: o Area under line gives displacement, slope gives acceleration Resultant displacement of 2 dimensions: o Vector sum of individual displacements o Use Pythagorean Theorem and SOH-CAH-TOA Relative motion: velocity of a body relative to a particular frame of reference Methods of writing direction: o GPS = [E25°S] or [25° S of E] o Bearing = [N 160°] (measure CW from North position) 2: Energy ● ● ● ● ● Dynamics: causes of motion Force: push or pull, vector quantity o 4 fundamental forces: gravitational, electromagnetic, strong nuclear, weak nuclear Unit of force: Newton (N) -> 1N = 1(kg x m)/s2 Net force/resultant force: vector sum of all forces acting on an object Mass: quantity of matter in an object (standard: kg) ● Weight: force of gravity on an o ...
Purchase document to see full attachment