4. Dynamics: Laws of motion
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4.1.1 Physical content of Newton's Laws
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Problem name |
Type |
Features |
Threads |
Use |
1. Hitting a bowling ball {*} |
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2. The sliding pizza {*}
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3. Forces in a car {*}
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4. Cart on a ramp (LoggerPro) {*}
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5. Comfort with forces
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6. Forces on a swimming paramecium (MC) {*} |
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7. A remote controlled car {*} |
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4.1.2 Formulation of Newton's Laws as foothold principles
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Problem name |
Type |
Features |
Threads |
Use |
1. Kicking a car {*}
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2. Molly on the skateboard {*}
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3. Crawling amoebas {*}
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4. The stooping hawk {*}
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5. Pushing a carriage {*}
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6. The book and the wall {*}
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7. The farmer and the donkey {*}
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8. Force on a woodpecker {*}
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9. Trap-jaw ants {*}
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10. Pushing a box {*} |
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11. Pushing two boxes {*} |
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12. The Limits of Object Egotism |
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13. The diving gannet {*} |
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14. Splitting the concept of force |
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15. Pushing a box - the details {*}
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16. Conditions for Newton 3 |
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17. Why bother with Newton 1? |
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Pushing a block on a block - overview |
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18. Pushing a block on a block - qualitative {*} |
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19. Pushing a block on a block - symbols {*} |
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20. Nathan's train {*} |
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21. Riding an elevator {*} |
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22. Drawing consistent graphs {*} |
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23. Toy models and Newton's Laws |
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24. The ball and the juggler (D) {*} (also 3.2.2.P10) |
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25. Son of the ball and the juggler {*} |
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26. Space jam {*} |
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4.2.1 Spring forces
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Problem name |
Type |
Features |
Threads |
Use |
1. Atomic force microscope
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2. The spring of DNA -- FBD {*}
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3. Hooke's law vs DNA {*}
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4. Stretching two springs {*} |
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5. The nature of Hooke's Law |
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6. Stretching multiple springs - toy model of a muscle {*}
6A. Stretching multiple springs - toy model of a normal force {*}
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4.2.2 Resistive forces
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Problem name |
Type |
Features |
Threads |
Use |
1. Propelling a paramecium Part 1: Equations {*} |
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2. Propelling a paramecium Part 2: Estimations {*} |
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3. Propelling a paramecium Part 3: Calculations (Excel) |
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4. The flying squirrel and the water flea {*} 4a. The flying squirrel and the water flea (ext) |
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5. Propelling a paramecium: Overview {*} |
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6. Pushing a block on a block - quantitative {*} |
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7. Falling coffee filters {*} |
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8. Ball falling in oil {*} |
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9. Krakatoa |
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4.2.3 Gravitational force
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Problem name |
Type |
Features |
Threads |
Use |
1. Comparing a light and a heavy object |
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(2 versions) |
2. Free-fall acceleration {*} |
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3. Rolling up and down {*} (also 3.1.4.P5) |
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4. Balls up! {*} |
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5. Are you OK to drive? {*} |
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6. The faster fall {*} |
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7. |
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8. |
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9. |
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4.2.4 Electric forces
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Problem name |
Type |
Features |
Threads |
Use |
1. Forces between charges {*}
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2. With a grain of salt {*}
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3. Electric field hockey (PhET) {*} |
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4. Analyzing dipoles {*}
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5. Counting charges {*}
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6. The content in Coulomb's law {*}
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7. Water coat forces {*}
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8. Estimating charge {*}
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8a. Estimating the charge on DNA {*}
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8b. But it's just a leetle bit different {*} |
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9. PIP2 cluster stability {*}
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10. Hydrogen bonding I
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11. Effect of molecular shape on electric forces {*}
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12. Molecular E-forces
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13. Three-charge problems |
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14. Oil-water electric forces I {*} |
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15. The Millikan oil drop experiment (also 8.2.P5) |
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16. Repelling pith balls {*} |
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17. Electric forces on charges {*} |
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18. Forces between a charge and a dipole {*} |
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19. Forces between dipoles {*} |
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20. Charge in the CGS system |
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21. Force between a charge and a dipole |
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22. |
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23. |
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4.3. Coherent vs. random motion
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4.3.1 Linear momentum
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Problem name |
Type |
Features |
Threads |
Use |
1. Taking Cyrano to the moon {*}
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2. Break a leg (Not!) {*}
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3. Momentum conservation in subsystems {*}
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4, Molecular collisions: 1 {*}
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5. Molecular collisions 2 {*}
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(2 versions) |
6. Molecular collisions 3
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7. Carts and graphs {*} |
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8. Colliding carts {*} |
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9. Hitting the wall |
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10. Closing the door {*} |
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11. When is momentum conserved? {*} |
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4.3.2 The role of randomness
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Problem name |
Type |
Features |
Threads |
Use |
1. Random vs coherent motion |
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2. Random or not, here I come |
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2A. Random or not, here I come (MC version) {*} |
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3. How many ions? (also 2.1.4.P13) {*} |
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4. Analyzing tradeoffs in mechanisms for moving |
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4.3.3 Diffusion and random walks
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Problem name |
Type |
Features |
Threads |
Use |
1. Diffusion in time and space
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1A. >Diffusion in time and space {*}
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2. Diffusion and viscosity {*}
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3. Cell polarization and activation
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4. Diffusion and slime molds {*}
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5. Random vs coherent motion (Listeria)
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6. Growing root tips
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7. Jittery cells |
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8. Diffusion in capillaries {*} |
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9. Relay cells
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10. Molarity and number density {*}
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11. Molarity and diffusion
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12. Molarity, density, and diffusion {*}
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13. Signaling across a synapse |
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14. Diffusion down an axon |
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15. Diffusion through an ion channel {*} |
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16. The Diffusion Spread Equation {*} |
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