Lecture Description
This lecture deals exclusively with frictional forces. Starting with a block at rest on a horizontal surface, Professor Lewin describes the normal force, the maximum frictional force that must be overcome to budge the block, and the coefficient of static friction. He continues to make measurements of the coefficient of static friction, and presents ways to reduce friction using hydroplanes and air tracks. Even a flea can move a very heavy book if the friction is zero (as demonstrated).
Course Description
This course is a first-semester freshman physics class in Newtonian Mechanics, Fluid Mechanics, and Kinetic Gas Theory. In addition to the basic concepts a variety of interesting topics are covered in this course: Binary Stars, Neutron Stars, Black Holes, Resonance Phenomena, Musical Instruments, Stellar Collapse, Supernovae, Astronomical observations from very high flying balloons (lecture 35), and you will be allowed a peek into the intriguing Quantum World.
Related Resources
Transcript
| Assignment 2
| Assignment 2 Solutions
Course Index
- Measurements of Space and Time
- 1-Dimensional Kinematics, Speed, Velocity, Acceleration
- Vectors, Dot Products, Cross Products, 3D Kinematics
- 3-D Kinematics, The Motion of Projectiles
- Circular Motion, Centrifuges, Moving Reference Frames
- Newton's Three Laws
- Weight and Weightlessness
- Friction
- Exam-I Review
- Hooke's Law and Simple Harmonic Motion
- Work and Mechanical Energy
- Resistive Forces
- Conservative Forces and SHO
- Satellite Orbits - Energy - Power
- Collisions and the Center of Mass
- Elastic and Inelastic Collisions
- Change of Momentum, Impulse, Rockets
- Exam Review II
- Rotational Kinetic Energy
- Angular Momentum
- Torques, Oscillating Bodies
- Elliptical Orbits
- Doppler Shift and Stellar Dynamics
- Rate of Change of Angular Momentum
- Static Equilibrium
- Elasticity of Materials
- Pressure in a Static Fluid
- Buoyant Force and Bernoulli's Equation
- Exam Review
- Other Oscillating Systems
- Forced Oscillations and Resonance
- Heat, Conductivity and Thermal Expansion
- Ideal-Gas Law and Phase Transitions, Isothermal Atmosphere
- The Wonderful Quantum World
- X-ray Astronomy and Astrophysics
