Answer:
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)
