Presentation on theme: "The Language of Motion Position – Velocity – Acceleration."— Presentation transcript:
The Language of Motion Position – Velocity – Acceleration
How Fast Is The Truck Moving? Observe the toy truck. What is the approximate speed?? 0 m/s 0.70 m/s 460 m/s 30,000 m/s 220,000 m/s Answer: All of them!
Scalar Vs. Vector Measurement Scalar: A quantity with no Direction attached to it, only Magnitude Ex: How many apples would you like to buy? Vector: A quantity with both Direction AND Magnitude. Ex: Dude, stop trying to sell me apples. Just turn around and walk 15 meters away from me. Magnitude: The amount of stuff. Direction: Which way something is going.
Distance Vs. Displacement Distance: Scalar Quantity Total distance covered Ex: Odometer on a car. Displacement Vector Quantity Change in position How far away from the starting point. Ex: How far have you travelled from home?
Speed Vs. Velocity Speed: Scalar quantity Ex: What is read on your speedometer Instantaneous Velocity Vector Quantity Your Speed and Direction at any given point in time. Average Velocity Vector Quantity (Total Distance / Total Time)
Instantaneous vs. Average Velocity Ex: Your instantaneous speed is changing at any given point in time but your average is as follows. Two ways to change Velocity? Change Speed Change Direction
Acceleration The change in velocity over the change in time Acceleration is a vector Can be positive or negative
Deceleration Try not to use the term decelerating or deceleration Instead us speeding up or slowing down Speeding Up When the Velocity and Acceleration have the same sign Ex: Positive Acceleration in the positive direction Slowing Down When the Velocity and Acceleration have opposite signs Ex: Positive Acceleration in the negative direction