课程门户-章节详情

Scott Edwards (赵安得)

1 Week 1
- 1.1 Introduction
- 1.2 Interactions cause change
- 1.3 Vectors: components and magnitude
- 1.4 What vectors can and cannot do
- 1.5 Unit vectors
- 1.6 Vector addition and subtraction
- 1.7 Displacement and velocity
- 1.8 Predicting a new position
- 1.9 Instantaneous velocity
- 1.10 Example: spacecraft
- 1.11 Momentum
- 1.12 Change in momentum
2 Week 2
- 2.1 Newton's 2nd Law
- 2.2 Impulse
- 2.3 How to predict the future (part 1)
- 2.4 How to predict the future (part 2)
- 2.5 What about F = ma?
- 2.6 Updating position
- 2.7 Non-constant force
- 2.8 Iterative prediction of motion
- 2.9 Can't we just use calculus?
- 2.10 A special case: constant force
- 2.11 Example: soccer penalty kick
- 2.12 Estimating interaction times
3 Week 3
- 3.1 Classifying interactions
- 3.2 Gravitation
- 3.3 Example: Earth and the Moon
- 3.4 Solving the Earth's orbit iteratively
- 3.5 Gravitation near the Earth's surface
- 3.6 The electric force
- 3.7 Limitations on predicting the future
- 3.8 The ball-and-spring model of matter
- 3.9 Tension
- 3.10 Friction
4 Week 4
- 4.1 Conservation of momentum
- 4.2 Center of mass
- 4.3 Instantaneous version of Newton's 2nd Law
- 4.4 Statics: dp/dt = 0
- 4.5 Example: pushing a box, with friction
- 4.6 Judging the direction of dp/dt
- 4.7 Curving motion: parallel and perpendicular components of dp/dt
- 4.8 Components from the vector dot product
- 4.9 Example: a falling ball
- 4.10 Rate of change of direction
- 4.11 Example: kissing circle for falling ball
- 4.12 Example: swinging a bucket
5 Week 5
- 5.1 The Energy Principle
- 5.2 Energy of a single particle
- 5.3 Kinetic energy
- 5.4 Work
- 5.5 Examples: cricket ball, neutron decay
- 5.6 Proof of the Energy Principle
- 5.7 Work done by a non-constant force
- 5.8 Potential energy
- 5.9 Gravitational potential energy
- 5.10 Example: Spacecraft leaving an asteroid
- 5.11 Bound and unbound states
- 5.12 Electrical potential energy
6 Week 6
- 6.1 Force is the negative gradient of potential energy
- 6.2 Spring potential energy
- 6.3 Example: bungee jumping
- 6.4 Path independence of potential energy
- 6.5 Internal energy
- 6.6 Dissipation and power
- 6.7 Translational and rotational kinetic energy
- 6.8 Moment of inertia
- 6.9 Calculating moment of inertia
- 6.10 Parallel axis theorem
- 6.11 Example: rolling down a hill
7 Week 7
- 7.1 Translational angular momentum
- 7.2 Direction of the angular momentum vector
- 7.3 Vector cross product
- 7.4 Example: a falling ball
- 7.5 Rotational angular momentum
- 7.6 Total angular momentum
- 7.7 Torque and the Angular Momentum Principle
- 7.8 Example: a comet
- 7.9 Angular Momentum Principle for multiparticle systems
- 7.10 Example: a seesaw
- 7.11 Example: a diver
- 7.12 Example: a stick sliding on ice
8 Week 8
- 8.1 Electric charge
- 8.2 Example: force between two protons
- 8.3 Electric field
- 8.4 Field of a single point charge
- 8.5 Example: where is the charge?
- 8.6 Superposition
- 8.7 Example: superposition of two charges
- 8.8 Electric dipole – parallel axis (part 1)
- 8.9 Electric dipole – parallel axis (part 2)
- 8.10 Electric dipole – perpendicular axis
- 8.11 Example: interaction between a dipole and a point charge
- 8.12 Dipole moment
9 Week 9
- 9.1 Charged particles in matter
- 9.2 How do objects become charged?
- 9.3 Example: how much charge on a piece of tape?
- 9.4 Polarization of atoms
- 9.5 Interaction between a neutral atom and a point charge
- 9.6 Polarization of insulators
- 9.7 Polarization of conductors
- 9.8 Charge motion in metals
- 9.9 Example: a rod and a ball
- 9.10 Practical limits on measuring the field
10 Week 10
- 10.1 Uniform thin rod: introduction
- 10.2 Uniform thin rod: break it into pieces
- 10.3 Uniform thin rod: add up the pieces
- 10.4 Uniform thin rod: check the answer
- 10.5 Example: a hollow cylinder
- 10.6 Uniform thin ring
- 10.7 Uniform disk (part 1)
- 10.8 Uniform disk (part 2)
- 10.9 Example: a rod and a disk
- 10.10 Two uniform disks: a capacitor
- 10.11 Spherical charge distributions
11 Week 11
- 11.1 Systems of charged objects
- 11.2 Potential difference in a uniform field
- 11.3 Field from potential difference
- 11.4 Potential difference in a non-uniform field
- 11.5 Potential difference near a point charge
- 11.6 Path independence
- 11.7 Potential at one location
- 11.8 Example: potential of a uniform ring
- 11.9 Potential difference in an insulator
- 11.10 Energy density and electric field
12 Week 12
- 12.1 Magnetic field
- 12.2 Biot-Savart Law for a single moving charge
- 12.3 Electron current
- 12.4 Conventional current
- 12.5 Biot-Savart Law for currents
- 12.6 Magnetic field of a long straight wire
- 12.7 Magnetic field of a circular current loop
- 12.8 Magnetic dipole moment
- 12.9 Magnetic field of a bar magnet
- 12.10 Atomic structure of magnets
13 Week 13
- 13.1 Magnetic force on a moving charge
- 13.2 Magnetic force on a current-carrying wire
- 13.3 Combining electric and magnetic forces
- 13.4 The Hall effect
- 13.5 Motional emf
- 13.6 Magnetic torque
- 13.7 Potential energy for a magnetic dipole
- 13.8 Force on a magnetic dipole
- 13.9 Example: the Stern-Gerlach experiment
- 13.10 Motors and generators
14 Week 14
- 14.1 Patterns of electric field
- 14.2 Electric flux
- 14.3 Gauss’s Law (part 1)
- 14.4 Gauss’s Law (part 2)
- 14.5 Reasoning from Gauss’s Law
- 14.6 Proving some important properties of metals
- 14.7 Gauss’s Law for magnetism
- 14.8 Patterns of magnetic field: Ampere’s Law
- 14.9 Applications of Ampere’s Law
- 14.10 Maxwell’s equations
15 Week 15
- 15.1 Curly electric fields
- 15.2 Faraday’s Law (part 1)
- 15.3 Faraday’s Law (part 2)
- 15.4 Faraday’s Law and motional emf
- 15.5 Maxwell's equations (again)
- 15.6 Inductance
- 15.7 Energy density in magnetic fields
- 15.8 The Ampere-Maxwell Law
- 15.9 Fields traveling through space (part 1)
- 15.10 Fields traveling through space (part 2)

Momentum

MISTAKE: Around 7 minutes in, while I was calculating at different speeds, I spoke some of the numbers incorrectly (although I wrote them correctly). A corrected version of this video will be ready soon.

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