SOLUTION: A car travels to the east from City A to City B, it takes 2 hours, and the road mileage is 100 miles. The map shows that the cities are only 80 miles apart. What is the average vel
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-> SOLUTION: A car travels to the east from City A to City B, it takes 2 hours, and the road mileage is 100 miles. The map shows that the cities are only 80 miles apart. What is the average vel
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Question 633862: A car travels to the east from City A to City B, it takes 2 hours, and the road mileage is 100 miles. The map shows that the cities are only 80 miles apart. What is the average velocity? Found 2 solutions by richwmiller, Edwin McCravy:Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! There is extra info that is meant to confuse you. The map distance is irrelevant.
The average is 50 mph. 100/2 =50
You can put this solution on YOUR website! A car travels to the east from City A to City B, it takes 2 hours, and the road mileage is 100 miles. The map shows that the cities are only 80 miles apart. What is the average velocity?
There is a difference between SPEED and VELOCITY.
Speed is a SCALAR quantity. It has magnitude only.
Velocity is a VECTOR quantity. It has both magnitude and direction.
If you had been asked the average SPEED, the answer would have been 100/2 or 50
miles/hour.
However you were asked for the average VELOCITY, you must specify both a
magnitude and a direction. So the average velocity has a magnitude of 80/2 =
40 mile/hour in the EAST direction. IOW it's the same as if you could have
driven EAST as the crow flies at 40mph.
Edwin
