John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds? A. - 20 meters/second, 20 meters/second B. 20 meters/second, 20 meters/second C. - 20 meters/second, - 20 meters/second D. 0 meters/second, 40 meters/second

Question

Physics

Guest

16 November, 06:38

John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds? A. - 20 meters/second, 20 meters/second B. 20 meters/second, 20 meters/second C. - 20 meters/second, - 20 meters/second D. 0 meters/second, 40 meters/second

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Answers (2)

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Karma Melton · Answer 1

B. 20 meters/second, 20 meters/second

Explanation:

Velocity of John = 20 meters/second north = + 20 meters/second

Velocity of Betty = 20 meters/second south = - 20 meters/second

If north is considered as positive then south will be negative.

So, the velocity of John will be + 20 meters/second and velocity of Betty will be - 20 meters/second.

But, the question is about their speeds and not velocity. The signs represent the directions. Speed does not show direction.

So, speed of John and Betty is 20 meters/second.

Ali House · Answer 2

Ali House 16 November, 09:59

0

The answer is definitely A