Physics of War


Here are some links we’ll be using in the 2015 Winterim: The Physics of War


Chapter 2

  • Mini-Matchstick Gun (with clothespin) 

       http://tkor.squarespace.com/


Physics of War – Chapter 3 – Basic Physics of Early Weapons


  1. How does velocity differ from speed?

Video clip:  YouTube “They Might Be Giants - Speed and Velocity w/ Marty Beller”

www.youtube.com/watch?v=DRb5PSxJerM (2:10)

 

2. Define acceleration.  What’s the formula for acceleration?

 Video clip: Science of NFL Football: Kinematics

http://science360.gov/obj/video/844d3b8f-5fe2-4907-928c-70f83023bd5c/science-nfl-football-kinematics (5:25)


3. How does an object’s mass differ from its weight?

You Tube: Conceptual physics Mass Vs Weight  

www.youtube.com/watch?v=aCqQzrPCcFM  (2:20)


4. What letter represents the force of gravity?

 

YouTube: Minute Physics: What is Gravity? 

www.youtube.com/watch?v=p_o4aY7xkXg (1:25)

 

5. Define force.  What’s the formula for force? 

 

YouTube: Gravity, Force, and Work

www.youtube.com/watch?v=LEs9J2IQIZY (1:47)


6. Define inertia.

YouTube: Inertia Demos Revised www.youtube.com/watch?v=3TpXlMO5fGE (2:21)

  

7. Note Newton’s First Law of Motion:  A body will continue in a state of rest or uniform motion in a straight line unless acted upon by a force.    So for an object to move, it must overcome _______________ .


Science of NFL Football:  Newton’s First Law of Motion

 http://science360.gov/obj/video/70fadaa8-c3d4-4132-ba1f-c98be5caeb14/science-nfl-football-newtons-first-law-motion (3:52)

 

8. Here’s Newton’s Third Law of Motion: Whenever a body exerts a force on a second body, the second body exerts a force on the first body.

 

Science of NFL Football:  Newton’s Third Law of Motion

http://science360.gov/obj/video/d0e16d27-05d4-4511-9394-2758aa066981/science-nfl-football-newtons-third-law-motion (4:12)

 

9. What is momentum?  What is the formula for momentum?

 

Bill Nye The Science Guy on Momentum  www.youtube.com/watch?v=y2Gb4NIv0Xg  (2:05)

 

10. When we say momentum is conserved, what does that mean? 

 

Video:   WHAT IS MOMENTUM?   www.youtube.com/watch?v=2htckwDkugI  (1:25)

 

11. How fast is the acceleration of gravity (metric and non-metric)?



12. How does kinetic energy differ from potential energy?


Physics: Kinetic and potential energy in a roller coaster   www.youtube.com/watch?v=-dpBVtAbKJU  (1:49)


Potential Energy: Wile E. Coyote:  www.youtube.com/watch?v=Jnj8mc04r9E  (1:22)

 

13. When we save energy is conserved, what does that mean? 

 

Circus Physics: Conservation of Energy       http://www.thirteen.org/programs/circus/circus-physics-conservation-of-energy/  (2:08)

 

14. I’ll help you out with the next few: 

 

·     Angular velocity is the rotational speed of an object around an axis. 

·      Torque is the tendency of an object to twist. It’s Force used to spin an object (or stop it from spinning).

 

Video: Understanding Torque  www.youtube.com/watch?v=tscGVGKCd5w (2:35)

 

·     Angular momentum is how much an object will continue to rotate around an axis if torque (an outside force) acts on it.

 

Video: Best Demonstration of Momentum Ever      http://www.wimp.com/demonstrationmomentum/  (3:12)


15. Here’s a comparison table to look at:

 

Linear Motion                 Rotational Motion

Acceleration                    Angular acceleration

Velocity                            Angular velocity

Distance traveled           Angle rotated

Momentum                     Angular momentum

Force                                Torque

 

 

Other Chap. 3 links









Chap. 4 - Roman Empire


Chap. 5 - Gunpowder and Cannons


Chap. 6 - Three Men Ahead of Their Time






Chap. 7 - Early Guns to Total Destruction









Chap. 8 - The Industrial Revolution



Chap. 9 - Napolean’s Weapons






Chap. 10 - The Civil War




Chap. 11 - Where Does the Bullet Go?





Chap. 12 - Aerodynamics



Chap. 13 - World War I


Chap. 14 - Radio and Radar in WW II


·      Khan Academy: Intro to Waves (13:03)   https://www.khanacademy.org/science/physics/waves-and-optics/v/introduction-to-waves


·      Khan Academy:  Intro to the Doppler Effect (10:37)   https://www.khanacademy.org/science/physics/waves-and-optics/v/introduction-to-the-doppler-effect


·      YouTube: Waves in a Sphere of Water on the Space Station (2:53)   http://www.youtube.com/watch?v=zaHLwla2WiI&feature=player_embedded


·      YouTube: Sound waves on fire (2:48)  http://www.youtube.com/watch?v=HpovwbPGEoo&feature=player_embedded


·      Clip:  Waves in a Tuba (4:41) http://science360.gov/obj/video/3df31ea0-5149-468a-96b6-380c6541aa37/tuba-physics


·      Clip: Infrared (6:45)  http://www.physicsvideos.net/waves.html


·      Clip: Ultraviolet (5:59)  http://www.physicsvideos.net/waves.html


·      Clip: How a Microwave Oven works (5:11)  http://www.physicsvideos.net/waves.html


Chap. 15 - Sonar and the Submarine





Chap. 16 - World War II

Make a Baking Soda and Vinegar Rocket

http://www.wikihow.com/Make-a-Baking-Soda-and-Vinegar-Rocket


Chap. 17 - The Atomic Bomb


·      YouTube: Mouse Trap/Nuclear Fission (1:16) http://www.physicsvideos.net/modern.html