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'''1C10. Velocity''' | = 1C10. Velocity = |
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'''1C20. Uniform Acceleration''' | ||<:10%>'''PIRA #'''||<:>'''Demonstration Name'''||<:60%>'''Abstract'''|| ||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.|| |
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'''1C30. Measuring g''' | = 1C20. Uniform Acceleration = ||<:10%>'''PIRA #'''||<:>'''Demonstration Name'''||<:60%>'''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 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. || ||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 heavy ball.|| ||1C20.20|| Equal Time & Equal Distance|| 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).|| ||1C20.30|| Inclined Air Track|| Place a risers under one end of an air track and use either; The Pasco interface with echo censer and computer to show velocity graph or Photogate timers to measure the velocity at two points.|| ||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.|| ||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 = ||<:10%>'''PIRA #'''||<:>'''Demonstration Name'''||<:60%>'''Abstract'''|| ||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.|| ||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 Stick, 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.|| |
[:PiraScheme#Mechanics: Table of Mechanics] |
[:Measurement: Mechanics (1A): Measurement] |
[:MotionIn2D: Mechanics (1C): Motion in Two Dimensions] |
[:Demonstrations:Lecture Demonstrations] |
Motion in One Dimension
PIRA classification 1C
1C10. Velocity
PIRA # |
Demonstration Name |
Abstract |
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
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 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. |
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 heavy ball. |
1C20.20 |
Equal Time & Equal Distance |
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). |
1C20.30 |
Inclined Air Track |
Place a risers under one end of an air track and use either; The Pasco interface with echo censer and computer to show velocity graph or Photogate timers to measure the velocity at two points. |
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. |
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 |
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. |
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 Stick, 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. |
[:Demonstrations:Demonstrations]
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