Elementary Physics quiz. 4:05 pm San Francisco time. half an hour

I need an explanation for this Physics question to help me study.

3.) Newton’s Laws

We then go on to Newton’s Laws of Motion, the very basic laws which describe how all normal size bodies (everything above atomic size) behave under the influence of forces. To understand Newton’s Second Law in detail, there will be a short discussion of proportionality. One important application of these laws is to construct a formula for Weight at the Earth’s surface.

4.) Circular Motion

Newton discovered the Law of Gravity by analyzing the orbit of the Moon about the Earth, an orbit which is (almost) circular. So to understand gravity, we must first understand circular motion.


QUIZ # 2 — on subjects 3.) and 4.)

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