# A car travels along a straight stretch of road. It proceeds for 14.1 mi at 59 mi/h, then 29.3 mi at 49 mi/h, and finally 44.2 mi at 35.4 mi/h. What is the car's average velocity during the entire trip?

##### 1 Answer

#### Answer:

Average velocity: **42.0 mi/h**

#### Explanation:

To get the car's *average velocity* for the entire trip, you need to first determine two things

*the total displacement of the car**the total time needed to complete the trip*

Since you're dealing with motion along a **straight line** and **in one direction**, the car's displacement will be equal to the *total distance* travelled.

This will get you

To get the total time needed to cover this distance, you first need to determine the time needed to cover the three distinct portions of the trip, i.e. the portions covered at different **speeds**.

In order, you get

The total time of the trip is

Therefore, the average velocity for the trip is