Final answer:
An apple falling near Earth's surface can be used to predict the motions of the Moon based on the principles of gravity.
Step-by-step explanation:
The question seems to be incomplete or unclear, as there is no specific difference mentioned between the two figures that are shadowed by an apple on a Tuesday. However, I can explain how an apple falling near Earth's surface can be used to predict the motions of the Moon.
When an object like an apple falls near the Earth's surface, it experiences a force called gravity. This force is also responsible for the motion of the Moon around the Earth. By studying the motion of the falling apple, scientists can understand the general principles of gravity and apply them to predict the motion of the Moon.
For example, the observation that the apple falls straight down towards the Earth can be generalized to infer that the Moon also follows a curved path due to the gravitational pull of the Earth.