PIRA
UW-Madison
Physics Lecture Demonstration 

MECHANICS

(1C) - Motion in One Dimension

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Last Page Update: 07/08/03
1C-Motion in One Dimension
10. Velocity
20. Uniform Aceleration
30. Measuring g
Color Code Key:
  • All "Black" Listings are demos currently available.
  • All "Blue" Listings are new demos that are available.
  • All "Red" Listings are new demos that arn't available.
  • All "Green" Listings are broken or out of order.

1C10 - Velocity

DCS # Demonstration Abstract/Description
1C10.10 Bulldozer or Cart on moving sheet The bulldozer or cart on a moving sheet moves in the same or opposite direction as the moving sheet, not at a angle, to show addition and subtraction of velocities.
1C10.20 PASCO dynamics cart 
1C10.21 Block of Wood on a String With a stopwatch, measure the time it takes to pull it  across the table at constant velocity in front of a meter stick.
1C10.25 Constant Velocity (Airtrack & Glider) Dots are superimposed on the screen every half second to mark the position of the air glider.
1C10.27 Velocity -air track and glider Level air track with the Pasco echo system and computer to show several velocity 
1C10.30 Approaching instantaneous velocity An air cart is given a reproducible velocity by a solenoid kicker. Flags of decreasing length interrupt a photo timer.
1C10.30 Approaching instantaneous velocity A ball breaks two foils to start and stop a timer. Change spacing of gates to approach instantaneous velocity.
1C10.32 Strobed Disc Look at a fluorescent spot on a 1725 RPM disc with a stroboscope at multiples of the frequency to demonstrate the limiting process.
1C10.51 Terminal Velocity A Marble is droped in to a cylener of Glycerine which teaches terminal velocity. Obtaining a slow constant velocity that can be measured.

1C20 - Uniform Acceleration

DCS # Demonstration Abstract/Description
1C20.10 Penny and Cotton (guinea and feather) Invert a large glass tube that contains a penny and a small cotton ball within;
Invert first with air and again when evacuated.
1C20.15 Drop wooden and lead ball of same size  Show that all objects, heavy and light, when droped simultaneously have the same acceleraion and that they hit the ground at the same time. 
1C20.17 Heavy and Light ball drop Try asking, at what height must the light ball be dropped at so that it hits the floor at the same time as the heavery ball.
1C20.20 Equal Time & Equal Distance Hang on celling two long strings with balls - one with equal distance intervals(1,4,8,12,16)? and the other with equal time intervals(1,4,9,16).
1C20.30 Inclined Airtrack Place a risers under one end of an air track and use either; The Pasco interface with echo sincer and computer to show velocity graph or Photogate timers to measure the velocity at two points.
1C20.35 Inclined Airtrack Useing the Pasco interface with echo sincer and computer to show the acceleration, velocity, or displacement graphs as a function of time is obtained for a cart on an inclined air track as it accelerates down and rebounds. (Pasco mass cars and track can also be used here)
1C20.40 Acceleration "Al" track Using the long aluminum inclined track and a metronome.  A lager steel ball is releaced and aloud to acelerate down the track. The metronome click off at distance intervals(1,4,8,12,16) down the track.
1C20.41 Acceleration "Al" track A ball rolls down a sloped track onto a flat track. As a  metronome clicks off every such that  the ball passes possed distance markers.
1C20.50 Duff's plane A ball leaves a trail as it oscillates back and forth while rolling down a chalk covered trough.

1C30 - Measuring g

DCS # Demonstration Abstract/Description
1C30.10 free fall timer A ball is timed as it drops .5m, 1m, 1.5m, or 2m.
1C30.16 dropping balls A ball is released by an electromagnet and a clock started. The catcher stops the clock and can be set at different heights.
1C30.15 Free Fall Apparatus A table top free fall apparatus with push button sparker and using spark tape. Different weight can be used on the ledging end of the tape.
1C30.41 Falling Drops A strobe illuminates water dripping from a faucet at an uniform rate.
1C30.46 "videostrobe" with falling drops Use the 60 Hz refresh rate of a video monitor to strobe falling drops by adjusting the rate to 60 Hz and having the stream fall past the screen.
1C30.55 Catch a Meter Sitck, Reaction time  Drop a meter stick and have a student catch it. Distance can be converted to reaction time.
1C30.55 Catch a Dollar, Reaction time Have a student try to catch a dollar starting with the fingers at the midpoint.
1C30.55 reaction time falling meter stick Have a student catch a falling meter stick and relate the distance dropped to the reaction time.
1C30.63 pendulum timed free fall A pendulum released from the side hits a ball dropped from the height that gives a fall time equal to a quarter period of the pendulum.
1C30.66 many bounce method Time a bouncing ball for many bounces and determine g using the coefficient of restitution.