In the last sections we have learned scalar and vector concepts. Equations are great for describing idealized motions but they dont always cut it. Italian physicist galileo galilei is usually credited with being the first to measure speed by considering the distance covered and.
Instantaneous Velocity Using Limit Definition
Or in the language of calculus speed is the first derivative of distance with respect to time.
If you havent dealt with calculus dont sweat this definition too.
Constant velocity vs acceleration. To have a constant velocity an object must have a constant speed in a constant direction. Constant direction constrains the object. The physics teacher walked a distance of 12 meters in 24 seconds.
Thus her average speed was 050 ms.
However since her displacement is 0 meters her average. Lesson 1 describing motion with words. Keep building your physics vocabulary. Sound waves in air.
Acoustic impedance intensity power sound wave.
2 1 position displacement and distance in describing an objects motion we should first talk about position where is the object. A position is a vector.
