Unit 7 History of Motion 7.1.

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Presentation transcript:

Unit 7 History of Motion 7.1

Aristotle 367 B.C.

Geocentrism Earth is center

Free Fall According to Aristotle “heavier people would fall faster than lighter people”

Galileo Galilei 1564-1643

Heliocentrism Sun is center

Free Fall According to Galileo “all people would fall at the same rate regardless of mass”

Sir Isaac Newton 1643-1727

Chapter 5 – Matter in Motion Section 1 – Measuring Motion What Is a Force?

Force A force is a push or a pull Forces act on objects Net force – combination of all forces acting on an object Newton (N) – the SI unit for force

Gravity

The gravitational “pull” of the Sun on the planets

Archimedes 287 B.C.

Archimedes Principle Notice how the crown weighs less in water