# Position / Displacement

• An object's position is its location at a given point in time

• • • Position and displacement are both vectors

• # Average Speed

• Average speed is the distance traveled divided by the time interval

• • Average speed is a scalar, and is measured in meters/second

# Average Velocity

• Velocity is the rate at which position changes.

• Average velocity is the displacement during a time interval divided by the time interval

• • Average velocity is a vector, and is also measured in meter/second

# Acceleration

• Acceleration is the rate at which velocity changes

• • Acceleration is a vector

• Units are m/s2

# The Position Vector # Average Velocity # Instantaneous Velocity

• Average velocity observed over an infinitely small time interval provides instantons velocity

• Instantaneous velocity is the derivative of position with respect to time • Area under the velocity-time graph is the displacement during that time interval # Acceleration

• Acceleration is the rate at which velocity changes 