Differences between revisions 24 and 25

[:PiraScheme#Mechanics: Table of Mechanics]

[:Measurement: Mechanics (1A): Measurement]

[:MotionIn2D: Mechanics (1D): Motion in Two Dimensions]

[:Demonstrations:Lecture Demonstrations]

Motion in One Dimension

PIRA classification 1C

Grayed Demos are either not available or haven't been built yet

1C10. Velocity

PIRA #	Demonstration Name	Abstract
1C10.10	Bulldozer or Cart on Moving Sheet	The bulldozer or cart moves in the same or opposite direction as the sheet which moves beneath it, to show addition and subtraction of velocities.
1C10.20	PASCO Dynamic Cart	Show the PASCO cart moving on the PASCO track.
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 (Air Track & 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	Use a level air track, the PASCO echo system and a computer to show several velocities.
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.
1C10.32	Strobed Disc	Look at a fluorescent spot on a 1725rpm disc with a stroboscope at multiples of the frequency to demonstrate the limiting process.
1C10.51	Terminal Velocity	A marble is dropped in to a cylinder of glycerine and quickly reaches terminal velocity. The marble obtains a slow and constant velocity that can be measured.

1C20. Uniform Acceleration

PIRA #	Demonstration Name	Abstract
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 Balls	Show that the two balls, one substantially heavier than the other, when dropped simultaneously have the same acceleration and hit the ground at the same time. The two balls are the same size.
1C20.20	Equal Time & Equal Distance	Two separate ropes strung through tennis balls are hung from the ceiling. On the first rope the tennis balls are spaced equidistantly (ex. every 3 feet). On the second rope the balls are spaced in a manner which represents the position of a falling ball at equal time intervals. (ex. every half second i.e. one ball at the top, one ball 4 ft below it, another 16 ft from the top, another 36 ft from the top, etc.)
1C20.35	Inclined Air Track	Using the PASCO interface, the echo censor and a computer to show the acceleration, velocity, or displacement graphs vs. time. The data is obtained from 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 I	A large steel ball accelerates down the inclined track as a metronome ticks at constant time intervals.
1C20.41	Acceleration "Al" track II	A large steel ball accelerates down the inclined track and onto a flat track as a metronome ticks at constant time intervals.
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

PIRA #	Demonstration Name	Abstract
1C30.10	Free Fall Timer	Drop a ball and time the fall.
1C30.16	Dropping Balls	A ball is released by an electromagnet and a clock started. The catcher stops the clock, thus measuring the duration of the fall.
1C30.15	Free Fall Spark Apparatus	A bob falls along a length spark tape to show the position of the bob at constant time intervals.
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.
1C30.55a	Catch a Meter Stick, Reaction time	Drop a meter stick and have a student catch it. Distance can be converted to reaction time.
1C30.55b	Catch a Dollar, Reaction time	Have a student try to catch a dollar starting with the fingers at the midpoint.
1C30.63	Pendulum Timed Free Fall	A pendulum released from the side hits a ball dropped from the specific 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.

[:Demonstrations:Demonstrations]

[:Instructional:Home]

-  ⇤ ← Revision 24 as of 2011-06-21 20:00:13 → 
  Size: 4838
  Editor: srnarf
  Comment:
+   ← Revision 25 as of 2011-06-22 15:26:47 → ⇥
  Size: 5000
  Editor: srnarf
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 9:
-Line 12:
+Line 13:
-||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  || A Pasco cart on the Pasco track.||
||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)||<#dddddd>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 ||
||<#dddddd> 1C10.30||<#dddddd>	Approaching instantaneous velocity||<#dddddd> An air cart is given a reproducible velocity by a solenoid kicker. Flags of decreasing length interrupt a photo timer.||
||<#dddddd>1C10.32||<#dddddd> Strobed Disc||<#dddddd> 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 reaches terminal velocity. Obtaining a slow constant velocity that can be measured.||
+||1C10.10||Bulldozer or Cart on Moving Sheet||The bulldozer or cart moves in the same or opposite direction as the sheet which moves beneath it, to show addition and subtraction of velocities.||
||1C10.20||PASCO Dynamic Cart||Show the PASCO cart moving on the PASCO track.||
||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.||
||<#dddddd>1C10.25||<#dddddd>Constant Velocity (Air Track & Glider)||<#dddddd>Dots are superimposed on the screen every half second to mark the position of the air glider.||
||1C10.27||Velocity Air Track and Glider||Use a level air track, the PASCO echo system and a computer to show several velocities. ||
||<#dddddd> 1C10.30||<#dddddd>	Approaching Instantaneous Velocity||<#dddddd>An air cart is given a reproducible velocity by a solenoid kicker. Flags of decreasing length interrupt a photo timer.||
||<#dddddd>1C10.32||<#dddddd>Strobed Disc||<#dddddd>Look at a fluorescent spot on a 1725rpm disc with a stroboscope at multiples of the frequency to demonstrate the limiting process.||
||1C10.51||Terminal Velocity||A marble is dropped in to a cylinder of glycerine and quickly reaches terminal velocity. The marble obtains a slow and constant velocity that can be measured.||
-Line 24:
+Line 25:
-||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 dropped simultaneously have the same acceleration and that they hit the ground at the same time. ||
||<#dddddd>1C20.20||<#dddddd> Equal Time & Equal Distance||<#dddddd> Hang on ceiling 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).||
||1C20.35|| Inclined Air Track|| Using the Pasco interface with echo censer 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 released and aloud to accelerate 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 level track. As a  metronome clicks off, such that the ball passes the marked distance.||
||<#dddddd>1C20.50||<#dddddd> Duff's plane||<#dddddd> A ball leaves a trail as it oscillates back and forth while rolling down a chalk covered trough.||
+||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 Balls||Show that the two balls, one substantially heavier than the other, when dropped simultaneously have the same acceleration and hit the ground at the same time. The two balls are the same size.||
||<#dddddd>1C20.20||<#dddddd>Equal Time & Equal Distance||<#dddddd>Two separate ropes strung through tennis balls are hung from the ceiling. On the first rope the tennis balls are spaced equidistantly (ex. every 3 feet). On the second rope the balls are spaced in a manner which represents the position of a falling ball at equal time intervals. (ex. every half second i.e. one ball at the top, one ball 4 ft below it, another 16 ft from the top, another 36 ft from the top, etc.)||
||1C20.35||Inclined Air Track||Using the PASCO interface, the echo censor and a computer to show the acceleration, velocity, or displacement graphs vs. time. The data is obtained from 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 I||A large steel ball accelerates down the inclined track as a metronome ticks at constant time intervals.||
||1C20.41||Acceleration "Al" track II||A large steel ball accelerates down the inclined track and onto a flat track as a metronome ticks at constant time intervals.||
||<#dddddd>1C20.50||<#dddddd>Duff's Plane||<#dddddd>A ball leaves a trail as it oscillates back and forth while rolling down a chalk covered trough.||
-Line 35:
+Line 36:
-||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 leading end of the tape.||
||<#dddddd>1C30.46||<#dddddd> "videostrobe" with falling drops||<#dddddd> 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.||
||1C30.55a|| Catch a Meter Stick, Reaction time||  Drop a meter stick and have a student catch it. Distance can be converted to reaction time.||
||1C30.55b|| Catch a Dollar, Reaction time|| Have a student try to catch a dollar starting with the fingers at the midpoint.||
||<#dddddd>1C30.63||<#dddddd> pendulum timed free fall||<#dddddd> 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.||
+||1C30.10||Free Fall Timer||Drop a ball and time the fall. ||
||1C30.16||Dropping Balls||A ball is released by an electromagnet and a clock started. The catcher stops the clock, thus measuring the duration of the fall.||
||1C30.15||Free Fall Spark Apparatus||A bob falls along a length spark tape to show the position of the bob at constant time intervals.||
||<#dddddd>1C30.46||<#dddddd>"Videostrobe" with Falling Drops||<#dddddd>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.||
||1C30.55a||Catch a Meter Stick, Reaction time||Drop a meter stick and have a student catch it. Distance can be converted to reaction time.||
||1C30.55b||Catch a Dollar, Reaction time||Have a student try to catch a dollar starting with the fingers at the midpoint.||
||<#dddddd>1C30.63||<#dddddd>Pendulum Timed Free Fall||<#dddddd>A pendulum released from the side hits a ball dropped from the specific 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.||

fw: Diff for "MotionIn1D"

Motion in One Dimension

1C10. Velocity

1C20. Uniform Acceleration

1C30. Measuring g