The correct answer is option 4, which states that there is no centrifugal force at the poles on planet Earth.
Centrifugal force is the apparent outward force experienced by an object moving in a curved path. It is the result of the object being pushed away from the center of rotation. On Earth, this force is primarily caused by the rotation of the planet itself.
At the equator (option 1), the centrifugal force is the strongest because this is the point furthest from the Earth`s axis of rotation. The rotational speed is highest at the equator, resulting in a larger outward force.
The Tropic of Cancer (option 2) and the Tropic of Capricorn (option 3) are both located at latitudes where the Sun is directly overhead at certain times of the year. While these locations are not at the equator, the centrifugal force is still present, though slightly weaker compared to the equator.
However, at the poles (option 4), the centrifugal force is effectively zero. This is because the poles are the closest point to the Earth`s axis of rotation. As a result, the rotational speed and the outward force are minimal at these locations.
Therefore, the statement that there is no centrifugal force at