012-04944B 2/93 Instruction Manual and Experiment Guide for the PASCO scientific Model ME-9283 TAPE TIMER ME 3 0 f1 f Hz 00 4 -928 Copyright © January 1993 $5.
012-04944B Tape Timer Table of Contents Section Page Copyright, Warranty, and Equipment Return ............................................... ii-iii How to Use this Manual .................................................................................. 1 Introduction ..................................................................................................... 1 Features ............................................................................................................ 2 Equipment ....
Tape Timer 012-04944B Copyright, Warranty and Equipment Return Please—Feel free to duplicate this manual subject to the copyright restrictions below. Copyright Notice Equipment Return The PASCO scientific Model ME-9283 Tape Timer manual is copyrighted and all rights reserved. However, permission is granted to non-profit educational institutions for reproduction of any part of this manual providing the reproductions are used only for their laboratories and are not sold for profit.
012-04944B Tape Timer Introduction The PASCO Model ME-9283 Tape Timer easily and accurately measures the motion of an object at two pre-calibrated frequencies. A slower setting (10 Hz) lends itself to most dynamics cart experiments, whereas the faster setting (40 Hz) is ideal for free fall experiments. This timing method is a visual demonstration of speed and acceleration. A moving object pulls a paper tape through the timer which prints dots on the tape at even time intervals.
Tape Timer 012-04944B Features Thumb screw Strike plate Hammer (not visible when strike plate is attached) Rod clamp Guide slots ME f Hz 00 4 Carbon paper disk -928 3 0 f1 Time interval selection switch (10 Hz or 40 Hz) Paper tape Battery compartment for 9V Battery (internal) Power adapter jack 2
012-04944B Tape Timer Equipment Additional supplies required to perform the Experiment: The Tape Timer includes the following items • ME-9283 apparatus – Table clamp and rod • (10) Carbon paper disks – Hooked Mass, 200 g • Roll of paper tape – Masking tape • 9 V battery – Graph paper • Instruction manual Additional Equipment Available: • 9 V DC Power Supply/Adapter ME-9283 Tape Timer ME -92 0 f1 f Hz 00 4 83 Paper tape 9 V Battery Carbon paper disks 3
Tape Timer 012-04944B Setup and Operation Inserting or Replacing the Carbon Paper Using the Tape Timer ➇ Turn the selector switch to the desired frequency ➀ Remove the thumb screw and the strike plate from and set the object in motion. While the object is pulling the tape through the timer, the hammer hits the strike plate at even time intervals. Each hit produces a dot on the paper transferred through the carbon paper. the top of the Tape Timer.
012-04944B Tape Timer Experiment: Acceleration Due to Gravity EQUIPMENT NEEDED – Tape Timer with paper tape – Table clamp and rod – Graph paper – Hooked mass 200 g – Masking tape Purpose The purpose of this experiment is to determine the acceleration due to gravity. Theory Paper tape (held by hand) A mass attached to one end of the tape is allowed to drop. The dots printed on the tape as it passes through the Tape Timer record the position of the mass as a function of time.
Tape Timer 012-04944B Record the positions in Table 1. Table 1 Data and Analysis Position (cm) ∆x (cm) Avg. v (cm/s) t (sec) Analysis ➀ Calculate the distance (∆x) between dots by subtracting the positions of adjacent dots. Record in Table 1. ➁ Calculate the average speed using where ∆t is the time between dots. v = ∆x ∆t Since the Tape Timer was set on 40 Hz, it was making 40 dots per second which means that the time between dots is 1/40 second or 0.025 seconds.
012-04944B Tape Timer Technical Support Feed-Back Contacting Technical Support If you have any comments about this product or this manual please let us know. If you have any suggestions on alternate experiments or find a problem in the manual please tell us. PASCO appreciates any customer feed-back. Your input helps us evaluate and improve our product.
