Answer:
Motion in one direction
1. First Day on Notes ya! Introduction to 1-D MotionDistance versus Displacement
2. Kinematics Kinematics is the branch of mechanics that describes the motion of objects without necessarily discussing what causes the motion. 1-Dimensional Kinematics (or 1- Dimensional motion) refers to motion in a straight line.
3. Distance The total length of the path traveled by an object is called distance. “How far have you walked?” is a typical distance question. The SI unit of distance is the meter (m).
4. Displacement ( ∆x ) The change in the position of a particle is called displacement. ∆ is a Greek letter used to represent the words “change in”. ∆x therefore means “change in x”. It is always calculated by final value minus initial value. “How far are you from home?” is a typical displacement question. The SI unit for displacement is the meter. Calculation of displacement: ∆x = x f − xi
5. Distance vs Displacement B 100 m displacement 50 m distance A A picture can help you distinguish between distance and displacement.
6. Questions Does the odometer in your car measure distance or displacement? Can you think of a circumstance in which it measures both distance and displacement?
7. Practice Problem: Two tennis players approach the net tocongratulate one another after a game. a) Find the distance anddisplacement of player A. b) Repeat for player B. A B 5m 2m
