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5.1 Forces - University Physics Volume 1 | OpenStax

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The study of motion is called kinematics, but kinematics only describes the way objects move—their velocity and their acceleration. Dynamics is the study of how forces affect the motion of objects and systems. It considers the causes of motion of objects and systems of interest, where a system is anything being analyzed. The foundation of dynamics are the laws of motion stated by Isaac Newton (1642–1727). These laws provide an example of the breadth and simplicity of principles under which nature functions. They are also universal laws in that they apply to situations on Earth and in space. Newton’s laws of motion were just one part of the monumental work that has made him legendary (Figure 5.2). The development of Newton’s laws marks the transition from the Renaissance to the modern era. Not until the advent of modern physics was it discovered that Newton’s laws produce a good description of motion only when the objects are moving at speeds much less than the speed of light and when t

5.1 Forces - University Physics Volume 1 | OpenStax Skip to Content Go to accessibility page Keyboard shortcuts menu University Physics Volume 1 5.1 Forces University Physics Volume 1 5.1 Forces Contents Highlights Print Close 5.1 Forces By the end of this section, you will be able to: Distinguish between kinematics and dynamics Understand the definition of force Identify simple free-body diagrams Define the SI unit of force, the newton Describe force as a vector The study of motion is called kinematics , but kinematics only describes the way objects move—their velocity and their acceleration.

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