You travel from point A to point B in a car moving at a constant speed of 70km/h Then you travel the same distance from point B to another point C. moving at a constant speed of 90 km/h Is your average speed for the entire trip from A to C equal to 80 km/? Explain why or why not.

SOLUTION 15Q

The car travels first half of the total distance at a speed of 70km/h, second half at a speed of 90km/h. We will find the average speed of the car.

(time passing for the first half of the motion)

(time passing for the second half of the motion)

Step 1 of 3

We will find time passing for the first half of the motion.

Step 2 of 3</p>

We will find the time for the second half of the motion.