The answer depends on your coordinate system. The man is moving to the north (or
up, forward, y) and the east (or across, to the right, x). Since his easterly
displacement is greater, he has a greater easterly velocity

Ex) Joe drove 13
meters North East in 2.0 seconds

What was Joes ...

Northeast displacement?

displacement east?

displacement north?

Northeast displacement? 13 m

displacement east? 12 m E

displacement north? 5 m N

Ex) Joe drove 13 meters North East in 2.0 seconds

We can say that Joe has 3 velocities

V = 6.5 m/s N.E.

V = 5 m N/2 seconds =

2.5 m/s North

V = 12 m East/2seconds

= 6 m/s East

1. Velocity is always written with
direction

Examples

• 5m/s east

• +5m/s

• 100 m/s downward

• -100 m/s

2. Equation:

V = ∆d/∆t

d = displacement

V = ∆d/∆t

Ex)
A car travels 90. m due
north in 15 secs and turns around
and travels 40. m due south in
5.0 secs. What is the
average velocity of the car?