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You travel from point A to point B in a car moving at a
Chapter 25, Problem 15Q(choose chapter or problem)
Problem 15Q
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.
Questions & Answers
QUESTION:
Problem 15Q
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.
ANSWER:
Step 1 of 4
The car travels the 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)