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LenKa [72]
3 years ago
6

Two cars are traveling in the same direction down a highway at 65 miles per hour. What is the relative velocity of the second ca

r in reference to the first?
Physics
1 answer:
Levart [38]3 years ago
8 0

Answer:

5 hours

Explanation:

Let the required time be x hours. The time will be the same for both cars.

The cars will cover different distances because they are travelling at different speeds.

<em>D=S×T </em>

The distance travelled by the slower car = 50×x miles.

The distance travelled by the faster car = 58×x miles.

The two distances differ by 40 miles.

58x−50x=40

8x=40

x=5 hours

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

A second method:

The difference in the distances is 40 miles

The difference in the speeds is #8mph.

The time to make up the 40 miles= \frac{40}{8}=5 hours

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Answer:

<em>When the speed is doubled, K = 100 J, when the speed is tripled, K = 225 J</em>

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