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12 May, 23:03

A person is riding in a car traveling 89 km/h from west to east along the Earth's equator. Earth rotates at this latitude at 1670 km/h in the same direction as the car travels. Which statement applies to this scenario? Both a man beside the road and an astronaut on the moon will observe the speed of the person in the car at 89 km/h. A man beside the road will observe the speed of the person in the car at 89 km/h and an astronaut on the moon will observe the speed of the person at 1581 km/h. A man beside the road will observe the speed of the person in the car at 89 km/h and an astronaut on the moon will observe the speed of the person at 1759 km/h.

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Answers (2)
  1. 12 May, 23:57
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    C. A man beside the road will observe the speed of the person in the car at 89 km/h and an astronaut on the moon will observe the speed of the person at 1759 km/h.
  2. 13 May, 02:21
    0
    A man beside the road will observe the speed of the person in the car at 89 km/h and an astronaut on the moon will observe the speed of the person at 1759 km/h.

    Explanation:

    Given that, a person is riding in a car traveling 89 km/h from west to east along the Earth's equator.

    And also Earth rotates at this latitude at 1670 km/h in the same direction as the car travels.

    Now, for an observer beside the road, earth is at rest as he also moves with earth at same speed.

    ⇒ relative speed of earth with respect to man on road is 0.

    so, relative speed of person in ca is 89 km/h with respect to man beside road.

    But now for an observer outside earth, the relative speed of earth is 1670 km/h and not 0. As he does not move with earth.

    ⇒ relative speed of person in car is 1670 + 89 = 1759 km/h with respect to astronaut. (here speeds are added because they move i same direction)
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