andy runs 40 meters east in 5 seconds and then 100 meters west in 15 seconds. His average velocity is ____ m/s.

Question

anonymous · Answer

|dw:1421724724483:dw|

anonymous · Answer

note Velocity is magnitude and direction so if the question were 40 E and 40 W the answer would be zero. But speed not.

anonymous · Answer

so you need to find the velocity for the 60 meter to W

javk · Answer

$$velocity = \frac{ displacement }{ time }$$
displacement is the total distance covered at the end; measured in a straight line

mrnood · Answer

@Javk 
Whilst I am sure that you understand 'displacement' I think the words you have used are not entirely clear.

In my interpretation the total distance 'covered' is 140m

Displacement in the resultant (final) distance from the start point to the end point, measured in a single straight line.

javk · Answer

Thankyou @MrNood, that is a much better way of putting it