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Concept Demonstrations by Chapter

Chapter 2: Kinematics in One-D

Chapter 8: Rotoational Motion

Chapter 13: Temperature and Kinetic Theory

Chapters 16-21: Electricity and Magnetism

Chapter 7: Linear Momentum

Chapter 10: Fluids

Chapters 14-15: Heat and Laws of Thermodynamics

 

Chapter 2: Describing Motion: Kenematics in One Dimension

 1

A pen and a piece of paper dropped from same height. Then the paper crumpled into a ball and both dropped again. What happens in the 2 cases and why? 

Chapter 7: Linear Momentum

1

Colliding Balls

 

As demonstrated in class, when an end ball is raised and allowed to hit the other balls (stationary) the one on the far end moves and the rest move only slightly if even noticeable.

Why? What principles are laws are being demonstrated here?

2

 

Loop

Ball at top on one side is given increasing velocities and eventually goes off the other end.

 What can be said about the velocities? 

3 Impulse Demonstration

 

Chapter 8: Rotational Motion - each demonstrated by several students

 

 1

Rotating object on a string through a cylinder: Radius of rotation decreased by pulling on string

What happens and why? 

2

Force applied to a wheel:

Force applied parallel to radius of the wheel, 90 degrees to radius of the wheel, and 45 degrees to the radius

What happens in each case and why? 

3

Rotating chair: Rotate with ball in lap and then extend the ball

What happens and why 

4

Wheel that is rotating clockwise. Change the orientation of the axis of rotation.

What happens and why?

5

Rotating Rods that are of equal mass. One has most of the mass in center and the other has most of mass equally divided between the two ends of the rod :   Demonstration

Rotate the rods with rotation axis through the center versus rotation axis at one of the ends:

What changes and why?

6

Wheel and chair system; the chair can rotate.        Demonstration

Wheel initially spinning clockwise with angular momentum vector up.

Chair initially stationary.

Change the direction of the angular momentum vector.

What happens and why?

 

Chapter 10: Fluids

 

1.  Hydrometer: Demonstration of Archimedes's Principle

2.  Holding water in a straw

 

3.  Does water seek its own height? 

     P =  rgh 

 

The pressure in the common reservoir must be the same. If it were not, then there would be movement

Pressure, as dervived, depends only on height, density (constant) and g (constant). It does not depend on the shape or the volume.

 

4.  What about this sitution.

      What is h for these tubes?  What force is acting? What is its direction of action?

 

Chapters 14-15: Heat and Laws of Thermodynamics

 

Chapters 16-21: Electricity and Magnetism

Magnetic Field Demonstration  Static Electricity Demonstration Static Electricity Demonstration

 

Leyden Jar  Electromagnet Demonstration Current Generation Using Magnet & Coil

 

   
Tray, Circular Magnet, and Bar Magnet   Circular Magnet with Iron Filings  Bar Magnet with Iron Filings

Soldering, PC Board, and Components