# kinematics question (1 Viewer)

#### somerandomperson

##### New Member
A car moves from point A to point B along a straight line. The car passes the first third of the distance with a constant velocity v1. The second third of the distance the car travels with a constant velocity v2 and for the last third of the distance the car moves with a velocity v3. What is the magnitude of its average velocity?

I got confused on how to come up with an expression for average velocity, anyone know how?

#### blyatman

##### Well-Known Member
Let be the total distance travelled. Now , so

The time spent in each section is therefore:

The average velocity is simply the total distance divided by the time taken:

The variable should cancel out from the above expression, leaving you with a final answer solely in terms of the given velocities.

Goddamn I'm bored at work.

#### CM_Tutor

##### Moderator
Moderator
And hence,

• Drongoski

#### Qeru

##### Well-Known Member
A car moves from point A to point B along a straight line. The car passes the first third of the distance with a constant velocity v1. The second third of the distance the car travels with a constant velocity v2 and for the last third of the distance the car moves with a velocity v3. What is the magnitude of its average velocity?

I got confused on how to come up with an expression for average velocity, anyone know how?

• CM_Tutor