PHYS111 Lecture Notes - Jaspreet Singh, Euclidean Vector, Parallelogram
23 Nov 2012
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Document Summary
A vector is a quantity with magnitude and direction. Vector addition and subtraction is possible through components, parallelogram method, and the head-to-tail method. Velocity (m/s), acceleration (m/s2), and momentum are all vectors derived from the physical properties of time, mass, and displacement. Velocity and speed both measure how fast an object is travelling. However, velocity measures the displacement (distance from start to end) relative to time, while speed measures the total distance covered relative to time. Instantaneous velocity is the speed and direction of any item in motion at a specific point e. g 15 m/s east. Acceleration is the change in velocity over time. To change from km/h to m/s, you would multiply by 1000m/1km and multiply by 1 hour/ 3600 seconds or simply divide by 3. 6. Gravity is always towards the center of the earth at a constant of. When dealing with 1-dimension problems, (1) always pick a direction (positive or negative) after drawing a diagram of the situation.
