Table of Mechanics Demonstration

List of Mechanics Equipment & Supplies

Lecture Demonstrations

PASCO Monkey and Hunter, 1D60.30

Topic and Concept:

Location:

MonkeyHunterSetup02-400.jpg

Abstract:

This is Pasco's version of "Shoot the Target". A target (in this case a stuffed monkey) is released about 2 meters above the table top as soon as a projectile (a Ball) is fired. The ball then hits the target in midair given that the system is properly aligned.

Equipment

Location

ID Number

Shoot the Target - Control Box w/power cord

ME, Bay A5, Shelf #1

1D60.30

Shoot the Target - Drop Box w/Electromagnet

Usually on support rod

1D60.30

Long Range Projectile Launcher w/Black Rod

ME, Bay A5, Shelf #1

1D60.30

Projectile Balls

ME, Bay A5, Shelf #1

EQ

Stuffed Monkey

ME, Bay A5, Shelf #1

1D60.30

Long Telephone cord

Usually on support rod

EQ

Photogate

ME, Bay A5, Shelf#1

EQ

3/4" Support Rod w/table clamp with the Drop Box at the top

Near door to 2241

EQ

2 "C"-clamps

Tack Cabinet by either 2241 & 2103

EQ

Important Setup Notes:

Setup and Procedure:

  1. Mount the support rod, with the Drop Box at the top, to one end of the lecture bench.
  2. Roughly align the Long Range Projectile Launcher on opposite end of lecture bench and with 2 C-clamps, clamp it in place. (The further apart, the higher the target must go.)
  3. Connect the power cord, telephone cord, photogate to the Control Box.
  4. Make sure the photogate is correctly positioned on the Long Range Projectile Launcher so that the ball will trip the gate with fired.
  5. Make sure the triggering system is not yet armed - The red light should be off. Otherwise, the photogate will trigger a premature drop of the monkey.

Alignment & Testing:

  1. Use a tall ladder and place either the Monkey or the Target onto the electromagnet pin, under the Drop Box between the two white pins.
  2. Look up through the bottom of the launcher, (not down the launcher). Use the two cross-hairs located in the bottom of the launcher barrel to align the launcher with the monkey.
  3. Roughly align the launcher, tighten set screws, and firmly clamp the base to the table with a pair of "C"-clamps.
  4. Use a mallet to adjust the launch's azimuthal and vertical angles of Projectile Launcher, if necessary.
  5. Load the launcher with a (yellow)Projectile Ball by using the 28 cm black plunger rod to push the projectile into the barrel to the desired spring setting, usually to the third stop or click. This is demonstrated in the video linked below. There are three such settings. The spring will click each time a new setting is reached.
  6. Arm the triggering system by flipping the switch on the Control Box - The red light should be on.

  7. Test fire by pulling the release cord to verify that the setup is properly aligned. If not, use a mallet to readjust the launch's azimuthal and vertical angles of Projectile Launcher.
  8. Reattach the monkey to the electromagnet and retest. If alignment is still bad, repeat above procedure.
  9. Note: Aiming slightly into the 1st quadrant may help.
  10. Once alignment is achieved, use the same above steps (minus the alignment adjustments) to perform the demo.

Cautions, Warnings, or Safety Concerns:

Discussion:

The Pasco projectile launcher is carefully aimed at a stuffed monkey by looking through the bottom of the launcher and using the cross-hair to target the monkey. The target is held up by an electromagnet which is coupled to the launcher via the PASCO interface and a photogate. The instant the projectile is launched through the photogate, the monkey is dropped. Since the monkey and the projectile are falling at the same rate, the projectile will hit the monkey in midair. The launcher has 3 spring settings so that you can show the students that this is independent to the particle's velocity. Please note that the first spring setting is very week and is for close range or the monkey must be set much higher then what is shown here.

LauncherSetup01-250.jpg

LauncherWRod03-250.jpg

DownBarrel04-250.jpg

Launcher02-250.jpg

SupportRodSetup01-250.jpg

Electromagnet01-250.jpg

SupportRod01-250.jpg

Telephonewire01-250.jpg

PASCOInterface01-250.jpg

PASCOInterface03-250.jpg

PASCOInterface02-250.jpg

AllParts01-250.jpg

Photogate03-250.jpg

Balls01-250.jpg

Sights01-250.jpg

Monkey01-250.jpg

Scale02-250.jpg

Videos:

References:

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fw: PASCO_Monkey_Hunter (last edited 2014-03-27 14:33:36 by srnarf)