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4 years ago

A car travels 5 miles north and then 2 miles south in 1/4 hour. What was its average speed?

Physics

1 answer:

ololo11 [35]4 years ago

4 0

The average speed of the car is 28 mph

Explanation:

The average speed of an object is equal to the ratio between the total distance covered by the object (regardless of its direction) and the time taken. Therefore:

$speed = \frac{d}{t}$

where

d is the total distance

t is the time taken

The car in this problem travels 5 miles north and 2 miles south, so the total distance covered is

d = 5 + 2 = 7 miles

While the time taken is

t = 1/4 h = 0.25 h

Therefore, the average speed is

$speed = \frac{7}{0.25}=28 mph$

Learn more about average speed:

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