Ch 2 Force and Motion - Engineering Physics I Chapter 2 Force and Motion Dr CHAN Man Ho Department of Physics Ch2 Force and Motion 2.1 2.2 2.3 2.4 2.5

# Ch 2 Force and Motion - Engineering Physics I Chapter 2...

• Notes
• ZeroHKS
• 43

This preview shows page 1 - 12 out of 43 pages.

Engineering Physics I Chapter 2: Force and Motion Dr. CHAN, Man Ho Department of Physics
Ch2. Force and Motion 2.1 Newtonian Mechanics 2.2 Newton’s First Law of Motion 2.3 Newton’s Second Law of Motion 2.4 Newton’s Third Law of Motion 2.5 Some Particular Forces 2.6 Applications of Newton’s Laws
2.1 Newtonian Mechanics Three laws of motion (empirical) basis for classical mechanics Describe the relation between a force and the motion it causes Can be applied to the motion of objects ranging in size from the very small to astronomical. Isaac Newton (1642 1727)
2.2 Newton’s First Law of Motion
2.2 Newton’s First Law of Motion Newton's first law of motion : all objects resist change in their state of motion. All objects have this tendency, i.e. they have inertia . The mass of an object is a measure of its inertia. Larger mass more inertia larger tendency to resist changes in its state of motion The mass of an object is usually given in unit of g (gram) or kg (kilogram) .
2.2 Newton’s First Law of Motion , . non-
2.3 Newton’s Second Law of Motion its
2.3 Newton’s Second Law of Motion Definition of Force According to the modern version of Newton’s Second Law of Motion, one may express it in equation form: For deeper understanding of above equation, we rewrite the R.H.S. as: net F mass acceleration ma d mv dv dp ma m dt dt dt
2.3 Newton’s Second Law of Motion Definition of Force .
2.3 Newton’s Second Law of Motion Unit of Force
2.3 Newton’s Second Law of Motion Net Force 10 N 10 N 10 N 20 N These forces balance.
• • • 