1. MECHANICS MECHANICS – The branch of Physics that deals with the motion of objects and the forces that change this motion. Kinematics – The motion part of Mechanics. Dynamics – The force part of Mechanics. MOTION

2. POSITION – The separation between an object and a reference point. DISTANCE (d) – The length of the path an object took as it moved between positions. SCALAR QUANTITY SCALAR QUANTITY – A measurement with magnitude but no direction. SIZE

3. DISPLACEMENT (d) – The straight line distance and direction between an object’s starting position and its stopping position. VECTOR QUANTITY VECTOR QUANTITY VECTOR QUANTITY VECTOR QUANTITY – A measurement that has magnitude and direction. Represented by bold face variable (text book) or an arrow above the variable. (Notes)

4. A. What is their final position with respect to Agnus’ initial position? B. What is Larry’s total displacement? C. What distance did each person travel? PRACTICE L A G 25.0 m 8.0 m 12.0 m Larry the minion walks 25.0 m, east to visit Agnus. They then walk 8.0m, west to visit Dr. Gru. They then all walk 12.0m, east to go to Super happy fun land. If Larry now travels back home, what is his displacement now?

5. SPEED – The RATE of distance. SCALAR

6. VELOCITY – The RATE of displacement. VECTOR

7. A soldier marches 18 paces, east in 7 seconds, stops for 5 seconds and then marches 12 more paces east in 6 seconds. What is the soldiers speed and velocity for the whole trip? The soldier now moves 25 paces, west. If this takes 10.0 more seconds, what is the soldiers speed and velocity for the whole trip? (From the beginning)