Definitions, including p = mv and F = dp/dt.

8.01

*Physics I: Classical Mechanics*, Fall 1999

Prof. Walter Lewin

**Course Material Related to This Topic:**

- Watch video clip from Lecture 15 (0:00 - 6:29)
Conservation of Momentum

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.

8.01T

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

Definition, including impulse as δp and F/δt; impact times and forces.

8.01

*Physics I: Classical Mechanics*, Fall 1999

Prof. Walter Lewin

**Course Material Related to This Topic:**

- Watch video clip from Lecture 17 (11:52 - 21:30)
Impulse

Dropping a tennis ball on top of a basketball causes the tennis ball to bounce very high.

8.01

*Physics I: Classical Mechanics*, Fall 1999

Prof. Walter Lewin

**Course Material Related to This Topic:**

- Watch video clip from Lecture 17 (21:30 - 24:08)
Basketball and Tennis Ball

Throwing objects produces recoil; comparison of recoil to thrust; calculation of rocket thrust for Saturn rocket.

8.01

*Physics I: Classical Mechanics*, Fall 1999

Prof. Walter Lewin

**Course Material Related to This Topic:**

- Watch video clip from Lecture 17 (24:08 - 31:39)
Impulse and Thrust

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.

8.01

*Physics I*, Fall 2003

Prof. Stanley Kowalski

**Course Material Related to This Topic:**

Definition of impulsive force, with example; elastic and inelastic collisions, with examples in one-dimension and two-dimensions.

8.01

*Physics I*, Fall 2003

Prof. Stanley Kowalski

**Course Material Related to This Topic:**

Power defined, with equation (P = F*v); impulse defined; center of mass defined; velocity and momentum of center of mass.

8.01L

*Physics I: Classical Mechanics*, Fall 2005

Dr. George Stephans

**Course Material Related to This Topic:**

Definition of inertial mass; standard kilogram; definition of momentum (p = m*v).

8.01T

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

Definition of force (F=ma); superposition principle; definition of impulse and average impulse; Newton's second law equations for force, acceleration, momentum.

8.01T

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

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.

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

Momentum and change of momentum defined, with equations; strategies for solving momentum and impulse problems; collisions and conservation of momentum; center of mass.

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

Friction and acceleration; which forces must be known to solve for energy and momentum; kinetic energy and momentum in a collision. Solution not included.

8.01L

*Physics I: Classical Mechanics*, Fall 2005

Dr. George Stephans

**Course Material Related to This Topic:**

- Complete practice problem 1–1

Kinetic energy of two blocks of unequal mass that experience the same impulse. Solution not included.

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

- Complete practice problem 3

Distance needed to stop a ping-pong ball and a bowling ball, which have the same initial momentum. Solution not included.

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

- Complete practice problem 4

Concept questions about conservation of momentum in isolated systems of one or more bodies. Solution not included.

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

- Complete practice problem 4–8

*Physics I*, Fall 2004

Dr. Peter Dourmashkin, Prof. J. David Litster, Prof. David Pritchard, Prof. Bernd Surrow

**Course Material Related to This Topic:**

Motion of a ball falling and bouncing off of the ground.

- Complete practice problem 3
- Check solution to practice problem 3

Force acting on the ankle of a person jumping to the ground from a height.

- Complete practice problem 1
- Check solution to practice problem 1

Motion of a superball bouncing on a table.

- Complete exam problem B1
- Check solution to exam problem B1

Finding fuel mass used for shuttle acceleration.

8.01

*Physics I: Classical Mechanics*, Fall 1999

Prof. Walter Lewin

**Course Material Related to This Topic:**

- Complete practice problem 9
- Check solution to practice problem 9

5-part impulse problem; calculating velocity, acceleration, burn time for rocket.

8.01

*Physics I: Classical Mechanics*, Fall 1999

Prof. Walter Lewin

**Course Material Related to This Topic:**

- Complete practice problem 10
- Check solution to practice problem 10

A rod is hit off-center; finding velocity, ω, position, and kinetic energy.

8.01

*Physics I: Classical Mechanics*, Fall 1999

Prof. Walter Lewin

**Course Material Related to This Topic:**

- Complete practice problem 9
- Check solution to practice problem 9

7-part orbit problem; finding impulses to allow spacecraft to reach sun.

8.01

*Physics I: Classical Mechanics*, Fall 1999

Prof. Walter Lewin

**Course Material Related to This Topic:**

- Complete practice problem 3
- Check solution to practice problem 3

6-part problem; p of ball before and after hitting floor; average force and impulse; change in kinetic energy.

8.01X

*Physics I: Classical Mechanics with an Experimental Focus*, Fall 2002

Dr. Peter Dourmashkin, Prof. Kate Scholberg

**Course Material Related to This Topic:**

- Complete exam problem 12
- Check solution to exam problem 12