Unit 2 Force and Translational Dynamics
- 2.1 Systems and Center of Mass
System · Single-object model · Open system · Velocity and acceleration of the center of mass · Substructure of a system · Center of mass · Center-of-mass coordinate of discrete objects · Differential mass element, dm · Modeling a system as an object at its center of mass
- 2.2 Forces and Free-Body Diagrams
Force · Contact force · Sum of force components, ΣFx · Free-body diagram · Center-of-mass dot · Component of a force
- 2.3 Newton’s Third Law
Newton's third law · Internal force · Tension
- 2.4 Newton’s First Law
Net force, F⃗net · Translational equilibrium · Newton's first law · Forces balanced along one axis · Inertial reference frame
- 2.5 Newton’s Second Law
Net force, F⃗net · Newton's second law · Internal and external forces
- 2.6 Gravitational Force
Newton’s law of universal gravitation · Field · Weight · Constant-force approximation · Near-surface field strength, g ≈ 10 N/kg · Apparent weight · Apparent weightlessness · Noninertial reference frame · Inertial mass · Gravitational mass · Equivalence of inertial and gravitational mass · Superposition of mass elements · Newton’s shell theorem · Linear force inside a uniform sphere
- 2.7 Kinetic and Static Friction
Kinetic friction, F⃗f,k · Coefficient of kinetic friction, μk · Static friction, F⃗f,s · Self-adjusting static friction · Comparison of μs and μk
- 2.8 Spring Forces
Ideal spring · Hooke's law and the spring constant, k · Direction of the spring force · Equivalent spring constant, keq
- 2.9 Resistive Forces
Resistive force, F⃗r · Differential equation for velocity · Terminal velocity
- 2.10 Circular Motion
Centripetal acceleration, ac · Net force in circular motion · Tangential acceleration, at · Net (total) acceleration in circular motion · Uniform circular motion · Circular orbit