A car travels 25.0 miles due east for one hour. Then it travels another 60.0 miles east for an additional hour. What is the average velocity of the entire trip?

A. 17.5 mph east

B. 35 mph east

C. 42.5 mph east

D. 85 mph east

The average velocity of the entire trip is 42.5 mph east ⇒ answer C

Explanation:

The average velocity of an object is its total displacement divided by

the total time taken.

It is the rate at which an object changes its position from one

place to another.

It is a Vector quantity

A car travels 25.0 miles due east for one hour

Then it travels another 60.0 miles east for an additional hour

We need to find his average velocity of the entire trip

He is travels due east in the whole trip

The total displacement that he travels = 25 + 60 = 85 miles east

He travels the first part in 1 hour and the second part in another hour

The total time for the whole trip = 1 + 1 = 2 hours

The average velocity = total displacement : total time

His average velocity = 85 : 2 = 42.5 miles/hour east

The average velocity of the entire trip is 42.5 mph east