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Video Clips

RealVideo®
6:29 minutes (0:00 - 6:29)
Definitions, including p = m*v and F = dp/dt.
Prof. Walter Lewin
Force
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RealVideo®
9:44 minutes (6:29 - 16:13)
Example, showing momentum conserved but kinetic energy lost; examples of KE loss.
Prof. Walter Lewin
Conservation of Momentum (beginning of V15)
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RealVideo®
6:39 minutes (16:13 - 22:52)
Example of inelastic car collision in 2D; explosions and gain of KE.
Prof. Walter Lewin
Inelastic Collisions (6:29 of V15)
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RealVideo®
12:37 minutes (22:52 - 35:39)
Demonstrations showing blocks exploding apart on air track; p = 0 while KE increases.
Prof. Walter Lewin
Real World Collisions (16:13 of V15)
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RealVideo®
9:41 minutes (0:00 - 9:41)
Definition, including superelastic collisions; equations of motion for elastic collisions; limiting cases.
Prof. Walter Lewin
Conservation of Momentum (beginning of V15)
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RealVideo®
13:11 minutes (9:41 - 22:52)
Elastic collisions of billiard balls and shuttles on air track; 3 demonstrations.
Prof. Walter Lewin
Elastic Collisions (beginning of V16)
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RealVideo®
8:08 minutes (22:52 - 31:00)
Calculations in reference frame of CM; transforms back and forth.
Prof. Walter Lewin
Conservation of Momentum (beginning of V15)
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RealVideo®
9:05 minutes (31:00 - 40:05)
Calculation of heat loss in inelastic collision using lab frame and CM frame; limiting cases.
Prof. Walter Lewin
Center of Mass Frame (22:52 of V16)
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RealVideo®
8:46 minutes (40:05 - 48:51)
Inelastic collisions on air track with m-->m and m-->2m; detailed calculations and predictions.
Prof. Walter Lewin
Heat Loss in Collisions (31:00 of V16)
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RealVideo®
6:04 minutes (0:00 - 6:04)
Setup and calculations for system of bullet hitting pendulum to measure speed.
Prof. Walter Lewin
Conservation of Momentum (beginning of V15) and Pendulum (29:07 of V10)
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RealVideo®
5:48 minutes (6:04 - 11:52)
Numerical calculations for ballistic pendulum experiment; kinetic energy loss approximated.
Prof. Walter Lewin
Ballistic Pendulum (beginning of V17)
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RealVideo®
3:15 minutes (45:53 - 49:08)
Conservation of momentum in inelastic collisions; loss of kinetic energy to heat; internal forces.
Prof. Walter Lewin
Collisions (6:29 of V15)
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RealVideo®
7:43 minutes (0:00 - 7:43)
Elastic and inelastic collision equations of motion; loss of kinetic energy to heat.
Prof. Walter Lewin
Collisions (6:29 of V15)
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Lecture Notes

PDF - 1.6 MB
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Page 1 to page 4
Definition of momentum (p = m*v); Newton's laws and momentum; law of conservation of momentum of a particle and of a system of particles, with examples; relationship between forces and momentum; elastic and inelastic collision, with examples.
Prof. Stanley Kowalski
Newton's Laws
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PDF - 1.6 MB
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Page 1 to page 6
Center of mass of an area of constant thickness, with examples; motion of the center of mass; internal and external forces, with examples; energy of a system of particles; variable mass motion, with rocket example.
Prof. Stanley Kowalski
Momentum, Center of Mass
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Page 1
Variable mass motion example problem.
Prof. Stanley Kowalski
Lecture 18
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Page 1 to page 6
Definition of impulsive force, with example; elastic and inelastic collisions, with examples in one-dimension and two-dimensions.
Prof. Stanley Kowalski
Momentum, Conservation of Energy
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PDF - 1.8 MB
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Page 1 to page 6
Two-dimension elastic collisions, with example; ballistic pendulum; definition and properties of collisions; collisions and kinetic energy in center of mass frame of reference.
Prof. Stanley Kowalski
Lecture 19
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PDF - 1.5 MB
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Page 1 to page 9
Definition of momentum (p = m*v); Newton's laws and momentum; law of conservation of momentum of a particle and of a system of particles, with examples; relationship between forces and momentum; elastic and inelastic collision, with examples.
Prof. Stanley Kowalski
Newton's Laws
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PDF - 1.6 MB
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Page 1 to page 16
Center of mass of an area of constant thickness, with examples; motion of the center of mass; internal and external forces, with examples; energy of a system of particles; variable mass motion, with rocket example.
Prof. Stanley Kowalski
Momentum, Center of Mass
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PDF 1.2 MB
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Page 1
Variable mass motion example problem.
Prof. Stanley Kowalski
Lecture 18
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PDF 1.2 MB
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Page 2 to page 16
Definition of impulsive force, with example; elastic and inelastic collisions, with examples in one-dimension and two-dimensions.
Prof. Stanley Kowalski
Momentum, Conservation of Energy
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PDF - 1.1 MB
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Page 1 to page 12
Two-dimension elastic collisions, with example; ballistic pendulum; definition and properties of collisions; and collisions and kinetic energy in center of mass frame of reference.
Prof. Stanley Kowalski
Lecture 19
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PDF
Page 1
Summary of work/energy; momentum defined, with equation (p = m*v); conservation of momentum.
Dr. George Stephans
Work-Energy
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PDF
Page 1
Conservation of momentum and energy; collisions.
Dr. George Stephans
Momentum
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Page 1
General problem-solving strategy, techniques, and helpful hints; momentum formulas.
Dr. George Stephans
Momentum
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PDF
Page 1 to page 27
Definition of momentum (p = m*v) and impulse; non-constant force and impulse; conservation of momentum; translational motion of the center of mass; modeling external forces and conservation of momentum; modeling of instantaneous collisions; momentum diagrams and equations.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
Newton's Laws
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Page 1 to page 20
Momentum and impulse equations; definition of conservation of momentum for an isolated system; momentum problem solving strategies; momentum diagram and equations; planar collision theory; elastic collisions; 2D elastic collision example problem.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
Lecture 19
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PDF
Page 1 to page 14
Momentum and collision experiment setup and procedure.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
Lecture 21
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PDF
Page 1 to page 8
Momentum and change of momentum defined, with equations; strategies for solving momentum and impulse problems; collisions and conservation of momentum; center of mass.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
Lectures 19, 21
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Practice Problems

PDF
Problem 1
Friction and acceleration; which forces must be known to solve for energy and momentum; kinetic energy and momentum in a collision. Solution not included.
Dr. George Stephans
None
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PDF
Problem 1 to problem 3
Changes in momentum and kinetic energy of two objects. Solution not included.
Dr. George Stephans
None
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PDF
Problem 1 to problem 2
Elastic and inelastic collisions. Solution not included.
Dr. George Stephans
None
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PDF
Problem 1
Momentum and kinetic energy of a baseball bat; simple harmonic motion of two mass-spring systems. Solution not included.
Dr. George Stephans
None
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Problem 24
Inelastic collision of two bodies.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 25
Elastic collision of two bodies, including projectile motion.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 26
Elastic collision of two bodies.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 27
Elastic collision of two carts on a track.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 28
Two people jumping off a railway flatcar.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 29
Elastic and inelastic collisions between a pendulum bob and an object.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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PDF
Problem 1 to problem 4
Concept questions about conservation of momentum in isolated systems of one or more bodies.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
None
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PDF
Problem 4 to problem 21
Concept questions about elastic and inelastic collisions between two or more bodies; some questions involve mass-spring systems.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
None
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PDF
Problem 1
Concept questions regarding collisions of carts on a frictionless track.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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PDF
Problem 4
Motion of an oscillating mass on a spring, before and after colliding with a lump of putty.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
None
Solution (PDF)Experiment 7 Pre-Lab
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Problem 2
Motion of two objects that collide elastically.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 3
Analysis of data collected in Experiment 7.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 4
Measuring the speed of a bullet by shooting a block suspended by two cables.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 2
Analysis of data collected in Experiment 9.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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PDF
Problem 3
9-part momentum problem: finding speed and kinetic energy for two people sliding a block.
Prof. Walter Lewin
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Problem 4
For two elastically colliding pucks, calculating velocity and kinetic energy before and after collision.
Prof. Walter Lewin
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Problem 5
Calculating height of tennis ball bouncing off dropped basketball.
Prof. Walter Lewin
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Problem 6
Momentum, kinetic energy, and velocity of center of mass for exploding particle.
Prof. Walter Lewin
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Problem 2
Gain in mechanical energy from looping around a planet; finding new velocity and energy.
Prof. Walter Lewin
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Exam Questions

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Problem 1
4-part problem; two balls collide at angle; finding momentum, speed before and after, and velocity of center of mass. Solutions are included after problems.
Prof. Stanley Kowalski
None
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Problem 1
Finding resultant velocity and kinetic energy for 2D collision; elastic vs. inelastic collision. Solutions are included after problems.
Prof. Stanley Kowalski
None
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Problem 4
Straight rod brushes against fixed object; finding ω, kinetic energy, speeds of both ends after collision. Solutions are included after problems.
Prof. Stanley Kowalski
None
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Problem 3
Collision of two hockey pucks.
Dr. George Stephans
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Problem 5
Short answer questions about elastic and inelastic collisions.
Dr. George Stephans
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Problem 6
Motion of two steel balls following a linear collision.
Dr. George Stephans
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Problem 9
Motion of a moving ball colliding with a stationary block.
Dr. George Stephans
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Problem 10
Inelastic collision of a clay ball with a block connected to a spring.
Dr. George Stephans
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Problem 6
Final speed and lost kinetic energy in explosion into two pieces.
Dr. Peter Dourmashkin, Prof. Kate Scholberg
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Problem 7
Calculating final and initial speed of one object in collision, as well as the mass ratio.
Dr. Peter Dourmashkin, Prof. Kate Scholberg
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Problem 6
For inelastic collision, finding initial and final velocities and pendulum attributes.
Dr. Peter Dourmashkin, Prof. Kate Scholberg
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Problem 12
6-part problem; p of ball before and after hitting floor; average force and impulse; change in kinetic energy.
Dr. Peter Dourmashkin, Prof. Kate Scholberg
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PDF
Problem 1a
Elastic collision of two rolling carts with respect to reference frame moving with the center of mass.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 1b
Collision of a moving body with a stationary body attached to a spring.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 2
Conservation of momentum of an exploding puck.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem B2
Collision of a body with another body connected to a spring.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 1c
Inelastic collision involving an oscillating mass attached to a spring.
Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow
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Problem 2a to problem 2b
Calculating speed of both objects after an elastic collision between a bullet and a pendulum.
Prof. Walter Lewin
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Problem 2c to problem 2d
Calculating θmax for pendulum after an inelastic collision between a bullet and a pendulum.
Prof. Walter Lewin
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Problem 6
5-part collision problem; finding p before and after, as well as resultant velocities and kinetic energy.
Prof. Walter Lewin
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