Question

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? -20 meters/second, 20 meters/second 20 meters/second, 20 meters/second -20 meters/second, -20 meters/second 0 meters/second, 40 meters/second Done

Answer 1

20 meters/second -20 meters/second

Step-by-step explanation:

John is travelling north at 20 meters/second. If north is the positive direction, then John is travelling at +20 meters/second, or just 20 m/s.

Betty is travelling south at 20 meters/second, then she is travelling in the negative direction, making her speed -20 meters/second.