Pre-lecture videos

Newton's Laws (6 min)

https://media.oregonstate.edu/media/t/0_ta9bhwiy

Equilibrium Example - Kitty Picture (7 min)

https://media.oregonstate.edu/media/t/0_l0dxbt04

Equilibrium Example - Skydiver (6 min)

https://media.oregonstate.edu/media/t/0_8hlqo30w

Supplemental but suggested

Equilibrium Example - Wolves 2D Tug-O-War (10 min)

https://media.oregonstate.edu/media/t/0_zyb5t982

Non-Equilibrium Example - skiing (7 min)

https://media.oregonstate.edu/media/t/0_6hgudjgd

Tension Up a Chain Example (13 min)

https://media.oregonstate.edu/media/t/0_hnf2gkpm

Here is a concise explanation of Newton's Second Law:

This is a comprehensive introduction to Newton's Second Law that covers how to deal with Newton's Second Law and systems. This online textbook discusses Newton's Second Law with diagrams, worked problem examples, and interactive conceptual questions. All notation in this text is consistent with BoxSand's:

Other Resources

This link will take you to the repository of other content related resources.

Khan Academy's introduction to Newton's Second Law in a 2 part video sequence:

https://www.youtube.com/watch?v=ou9YMWlJgkE

https://www.youtube.com/watch?v=24vtg9Ehr0Q

Doc Schuster's introduction to Newton's Second Law part 1:

https://www.youtube.com/watch?v=_Z7qivqbSBI

Doc Schuster's introduction to Newton's Second Law part 2:

https://www.youtube.com/watch?v=_Z7qivqbSBI

Here is a really great video by Dr. Davies from Gordon State College that relates a physics problem, Newton's Second Law, and FBD:

https://www.youtube.com/watch?v=NDiQ363uBj8

Other Resources

This link will take you to the repository of other content related resources.

Here is a PhET simulation relating force and motion:

Another simple tool to look at forces and acceleration by PhET. This simulation uses FBD on the right, make sure you are familiar with that tool. It might be best to turn friction off initially:

(requires download)

For additional simulations on this subject, visit the simulations repository.

Low Friction Atowood Machine demo,

https://www.youtube.com/watch?v=4ovhEkSIqV0

Pasco dunamics cart and track: Forces, Mass, and Acceleration connection to Newton's 2nd law,

https://www.youtube.com/watch?v=aDLYpJoSRhM

For additional demos involving this subject, visit the demo repository

1. A $2 \, kg$ experiences a net force of $\sum \vec{F} = \langle 1,3,4 \rangle \, N$. What is the acceleration of this object?

2. A $5 \, kg$ object sits on top of a frictionless table with a force pushing it to the right as shown in the image below. If the magnitude of the force of push is $4 \, N$, what is the acceleration of the object?

3. A $5 \, kg$ object is in static equilibrium while sitting on top of a table with a force pushing it straight downward as shown in the image below. If the magnitude of the force of push is $4 \, N$, what is the normal force between the table and the object?

CLICK HERE for solutions.

Short foundation building questions, often used as clicker questions, can be found in the clicker questions repository for this subject.

BoxSand's Quantitative Practice Problems

BoxSand's Multiple Select Problems

BoxSand's Conceptual Problems

Recommended example practice problems 

Set 1: Lifting a Piano, Playing in an Elevator

Set 2: Physics Classroom Laws of Motions

​Set 3: Free Body Diagrams, and Other 2nd Law Problems

For additional practice problems and worked examples, visit the link below. If you've found example problems that you've used please help us out and submit them to the student contributed content section.