Lecture Demonstrations Laboratory

Demo Request History

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PHYS 142E: General Physics I

•  video  - Standards of Measurement
  (no meter sticks; INSTEAD: cardboard liter, cardboard cubic meter, 1 kilogram mass. Also: measure density of aluminum (aluminum, beaker with water, electronic scale, camera) )

• The Video Encyclopedia of Physics Demonstrations
  (disc 1, #3 "Adding vectors". ALSO: two ropes, each about 5 or 10 feet long.(two students will pull a third student to demonstrate force vector addition) )

•  video  - Uniform Linear Acceleration - Time
  (just want to measure g--the more incline, the better, I believe )

•  video  - Marble and Feather
  (Also: brightly colored tennis ball or other object to push off lab bench )
• Measurement of Free Fall Acceleration
• Falling Drops of Milk
• The Mechanical Universe
  (Side 1--hammer and feather on moon )

• Propeller Cart on Track
  (with Pasco track )
•  video  - Shoot and Drop
• Projectile Motion II
• The Films of Charles and Ray Eames: Pioneers of Visual Ideas

• Centripetal Acceleration
•  video  - Ballistics Cart
  (ALSO: wire jumps out of strong magnet when current applied to wire )
• The Video Encyclopedia of Physics Demonstrations
  (2-3 and 2-4 I believe--relativity car flat and on slope )

• Propeller Cart on Track
  (no propeller cart. Instead: air track, 3 different mass cars, fairly loose spring (to pull the cars and show different accelerations). ALSO: non-dangerous ball on string )
• The Video Encyclopedia of Physics Demonstrations
  (2-8, which should be 2-D bulldozer on moving sheet )
• Frames of Reference

• Propeller Cart on Track
  (no propeller cart. INSTEAD: air track, 3 different mass cars. ALSO: medicine ball and rolling cart to sit on )
•  video  - Tablecloth Pull
  (ALSO: big penny and cardboard to slide on )
• The Video Encyclopedia of Physics Demonstrations
  (2-25, which is a "propeller" animation )

•  video  - Tablecloth Pull
  (modified version--only need table, tablecloth, and Air Pro puck (maybe check battery?)ALSO: wood block to push )
•  photos  - Knot in Static Equilibrium
  (ALSO: Normal force demo (weight clamped to baby scale on plank whose angle can be changed. Want to show how normal force varies with angle. )
• Force and Tension
  (2 rolling carts for students to sit on and medium length piece of rope for them to pull each other. ALSO: 2 fairly long springs for students to pull each other with )

• Coefficient of Friction
  (Don't need ramp. Instead: wooden box, string, Newton scale and weights to put in box (want to pull box along table and show how frictional force varies). ALSO: Bloomfield's chair lift. ALSO: simple machine with pulleys in which weight is lifted by double the tension but half the distance )

• Fire Extinguisher Rocket Cart
  (ALSO: bathroom scale with camera on readout. ALSO: weight hanging (from ceiling if possible) with Newton scale attached--will set in pendulum motion and observe how force varies )
•  video  - Air Table Collisions
  (want puck to move in circle with string attached through hole to hanging weight to provide tension. ALSO: big LED stopwatch )

• Work Done by a Compressed Spring
  (ALSO: roll ball down the longest red plastic track you have, so it ends rolling horizontal. want to see that ball's speed is roughly same as if dropped vertically through same height )

• Simple Machines
  (the following please: hydraulic press with can to crush,simple lever, wedge with 2 blocks, car jack with clean cloth to cover (so student can sit on it), big LED stopwatch )

•  video  - Loop - the - Loop
  (ALSO: plastic track with ball rolling back-and-forth to show how potential plus kinetic energy is constant )
• Electrolysis of Water
  (ALSO: solar car with somewhat portable light source )

•  video  - Conservative System
  (ALSO: sphere (large black globe probably) off of which I can slide a small mass and watch it lose contact )
•  video  - Loop - the - Loop

•  video  - Ballistics on Air Track
  (ALSO: 2 black rolling carts and medicine ball )

• Reaction Cars
  (no timers. ALSO: 2 equal mass cars I can collide elastically and inelastically )
• The Video Encyclopedia of Physics Demonstrations
  (# 5-6 which is 2-D collisions )

•  video  - Center of Mass of Virginia
  (ALSO: air track with push-me-pull-you toy with arrow marking center of mass )
•  video  - Center of Mass Toys
  (gray and red leaning tower of pisa,3 story building which tilts, tricky styrofoam balls on wood rod,fork and spoon trick,yellow semicircle toy, mickey on tightrope,horse with hanging weight, large styrofoam with red and green lights )

•  video  - Moment of Inertia Wheel
  (with hanging weight and big LED timer )

•  video  - The Falling Rigid Body
  (ALSO: strobe light and large fan and a towel (to slow down rotation rate) )

•  video  - Moment of Inertia Wheel
  (with hanging mass and big LED timer. ALSO: torque wrench and wood with bolt to pass around. ALSO: big "spool and thread" )

•  video  - Rolling Objects and Moments of Inertia
  (ALSO: rubber ball on string threaded through plastic tube (so I can shorten radius while ball is whirling around). ALSO: big "spool and thread" )

•  video  - Vector Nature of Angular Momentum
  (ALSO: pocket watch and laser demo (conservation of angular momentum). ALSO: big cardboard cubic meter--want to tip over, so may need a block in front )
• Conservation Laws in Zero 'G'

•  video  - Center of Mass Toys
  (only need big "spool and thread." ALSO: pull bicycle wheel over a bump: tie strings to each side axle on the wheel, and attach Newton scale. Pull with horizontal force over a small bump (1 cm or so) and measure force needed to just start over bump. It should be approx given by the following formula: ratio of pulling force to weight of wheel= sqrt(2h/R) where h is height of bump and R is radius of wheel. The approx holds if h/R is small. )

•  video  - Conservative System
  (Just want bowling ball by itself to roll on table. ALSO: bicycle wheel, Newton scale, and bump again. )

•  video  - Precession of Bicycle Wheel Under Gravity Force
• Gyrocompass
  (and weights to hang from it. ALSO: Donald Duck plastered against rotating wall as viewed with wireless camera. ALSO: 2x4, 47 pound weight, suspended so I can hang from it and balance. )

• Confocal Mirrors
  (ALSO: inverse-sqaure law demo with light bulb and glass plate ruled off in squares. ALSO: measure density of a rock (rock, beaker of water, camera, electronic scale) )

• The Mechanical Universe
  (part 25--already queued and in basket )

•  video  - Pendula, Spring and Simple
  (spring set-up only (masses, spring, big LED timer) )
• Projected Uniform Circular Motion

•  video  - Forced Oscillations
• Coupled Pendulum Oscillators
•  video  - Breaking a Wine Glass

•  video  - Breaking a Wine Glass
  (only for 9 AM section. ALSO: model of human forearm (pivoted rod, string attached near pivot with Newton scale to measure tension, weight hanging at end). ALSO: Newton's Folly. ALSO: break raquetball with LN2 )

• Boyle's Law
  (ALSO: weigh air (flask with valve, vacuum pump, electronic scale, camera on scale). ALSO: combustion demo with milk jug, methanol and spark maker. ALSO: big gas cylinder for show and tell (Helium or whatever) )

•  video  - Boiling by Reducing Pressure

• LN2 - Thermal Effects on Solids and Gases
  (2 air balloons and 2 helium balloons to freeze with liquid nitrogen. Also: delicious steak and lobster dinner to freeze with liquid nitrogen. )
• Crookes Radiometer (Light Mill)