Speed with a direction

V= (change in distance/(change in time)

Velocity is a vector quanitity that refers to the rate at which an object changes its posiiton (displacement divided by time). Velocity differs from speed in the sense that velocity is direction aware, and speed is not.

Average Velocity= displacement/ time

Instantaneous velocity: the measure of velocity at a specific time.

  • direction of the velocity vector is the same direction the object moves
  • relevant, needs a reference point

EX: 440/8 = 55 mi due west


1. is the SI unit for velocity m/s? True or false?

2. If Carlie's private jet travels a distance of 12,500 miles in 1 hr, what would the velocity of the jet be?

12500/3200 =

3. True or false? Velocity is ignorant of direction?

4. A toy car moves 8 m in 4 s at the constant velocity. What is the car’s velocity?

1. True 2. 3.91 m/s northeast 3. False 4. 2 m/s