Question

A car travels 200.0 miles west for two hours. Then it travels another 75.0 miles west for an additional hour. What is the average velocity of the entire trip?

Answer 1

91.7 mph west

Step-by-step explanation:

Answer 2

91.7 mph west

Step-by-step explanation:

The average velocity is the ratio between the displacement and the time taken:

`v=(d)/(t)`

where d is the displacement and t the time taken.

First of all, we need to find the net displacement. We know that the car moves

200.0 miles west + 75.0 miles west = 275.0 miles west

While the total time taken is

`t=2 h + 1 h = 3 h`

So now substituting into the equation above, we find the average velocity:

`v=(275.0)/(3)=91.7 mph`

And the direction is the same as the displacement, so west.