If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.
You already know Dokkio is an AI-powered assistant to organize & manage your digital files & messages. Very soon, Dokkio will support Outlook as well as One Drive. Check it out today!

Homework Problems Physics 131: Section 4

Page history last edited by Joe Redish 4 years ago

NEXUS/Physics > InstructorsHomePage > The Problem Collection > Homework Problems Physics 131

Homework Problems:

Interpretation of Problem Classification Icons

4. Dynamics: Laws of motion
4.1.1 Physical content of Newton's Laws
Problem name	Type	Features	Threads	Use
1. Hitting a bowling ball {*}
2. The sliding pizza {*}
3. Forces in a car {*}
4. Cart on a ramp (LoggerPro) {*}
5. Comfort with forces
6. Forces on a swimming paramecium (MC) {*}
7. A remote controlled car {*}


4.1.2 Formulation of Newton's Laws as foothold principles
Problem name	Type	Features	Threads	Use
1. Kicking a car {*}
2. Molly on the skateboard {*}
3. Crawling amoebas {*}
4. The stooping hawk {*}
5. Pushing a carriage {*}
6. The book and the wall {*}
7. The farmer and the donkey {*}
8. Force on a woodpecker {*}
9. Trap-jaw ants {*}
10. Pushing a box {*}
11. Pushing two boxes {*}
12. The Limits of Object Egotism
13. The diving gannet {*}
14. Splitting the concept of force
15. Pushing a box - the details {*}
16. Conditions for Newton 3
17. Why bother with Newton 1?
Pushing a block on a block - overview
18. Pushing a block on a block - qualitative {*}
19. Pushing a block on a block - symbols {*}
20. Nathan's train {*}
21. Riding an elevator {*}
22. Drawing consistent graphs {*}
23. Toy models and Newton's Laws
24. The ball and the juggler (D) {*} (also 3.2.2.P10)
25. Son of the ball and the juggler {*}
26. Space jam {*}
4.2.1 Spring forces
Problem name	Type	Features	Threads	Use
1. Atomic force microscope
2. The spring of DNA -- FBD {*}
3. Hooke's law vs DNA {*}
4. Stretching two springs {*}
5. The nature of Hooke's Law
6. Stretching multiple springs - toy model of a muscle {} 6A. Stretching multiple springs - toy model of a normal force {}


4.2.2 Resistive forces
Problem name	Type	Features	Threads	Use
1. Propelling a paramecium Part 1: Equations {*}
2. Propelling a paramecium Part 2: Estimations {*}
3. Propelling a paramecium Part 3: Calculations (Excel)
4. The flying squirrel and the water flea {*} 4a. The flying squirrel and the water flea (ext)
5. Propelling a paramecium: Overview {*}
6. Pushing a block on a block - quantitative {*}
7. Falling coffee filters {*}
8. Ball falling in oil {*}
9. Krakatoa
4.2.3 Gravitational force
Problem name	Type	Features	Threads	Use
1. Comparing a light and a heavy object				(2 versions)
2. Free-fall acceleration {*}
3. Rolling up and down {*} (also 3.1.4.P5)
4. Balls up! {*}
5. Are you OK to drive? {*}
6. The faster fall {*}
7.
8.
9.
4.2.4 Electric forces
Problem name	Type	Features	Threads	Use
1. Forces between charges {*}
2. With a grain of salt {*}
3. Electric field hockey (PhET) {*}
4. Analyzing dipoles {*}
5. Counting charges {*}
6. The content in Coulomb's law {*}
7. Water coat forces {*}
8. Estimating charge {*}
8a. Estimating the charge on DNA {*}
8b. But it's just a leetle bit different {*}
9. PIP₂ cluster stability {*}
10. Hydrogen bonding I
11. Effect of molecular shape on electric forces {*}
12. Molecular E-forces
13. Three-charge problems
14. Oil-water electric forces I {*}
15. The Millikan oil drop experiment (also 8.2.P5)
16. Repelling pith balls {*}
17. Electric forces on charges {*}
18. Forces between a charge and a dipole {*}
19. Forces between dipoles {*}
20. Charge in the CGS system
21. Force between a charge and a dipole
22.
23.
4.3. Coherent vs. random motion
4.3.1 Linear momentum
Problem name	Type	Features	Threads	Use
1. Taking Cyrano to the moon {*}
2. Break a leg (Not!) {*}
3. Momentum conservation in subsystems {*}
4, Molecular collisions: 1 {*}
5. Molecular collisions 2 {*}				(2 versions)
6. Molecular collisions 3
7. Carts and graphs {*}
8. Colliding carts {*}
9. Hitting the wall
10. Closing the door {*}
11. When is momentum conserved? {*}

4.3.2 The role of randomness
Problem name	Type	Features	Threads	Use
1. Random vs coherent motion
2. Random or not, here I come
2A. Random or not, here I come (MC version) {*}
3. How many ions? (also 2.1.4.P13) {*}
4. Analyzing tradeoffs in mechanisms for moving



4.3.3 Diffusion and random walks
Problem name	Type	Features	Threads	Use
1. Diffusion in time and space
1A. >Diffusion in time and space {*}
2. Diffusion and viscosity {*}
3. Cell polarization and activation
4. Diffusion and slime molds {*}
5. Random vs coherent motion (Listeria)
6. Growing root tips
7. Jittery cells
8. Diffusion in capillaries {*}
9. Relay cells
10. Molarity and number density {*}
11. Molarity and diffusion
12. Molarity, density, and diffusion {*}
13. Signaling across a synapse
14. Diffusion down an axon
15. Diffusion through an ion channel {*}
16. The Diffusion Spread Equation {*}