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PASCO ME-8089 Computer-Based Centripetal Force Accessory User Manual

Page 7

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Model No. ME-8089

Centripetal Force Accessory

7

Attaching a Motor Drive with Power Supply (Optional)

If you plan to do a constant speed experiment, you may want to consider purchasing a motor
drive. A motor drive requires a DC power supply of function generator for operation. The
instructions for mounting the drive are included with the apparatus. Figure 6 shows a picture
of a motor drive attached to the 3-step pulley.

PASCO’s Motor Drive (ME-8955) comes with a drive belt for connecting the motor drive to
the pulley.

Suggested Experiment: Centripetal Force and Velocity

*PASPORT sensors (with PS-prefix) require a PASPORT interface [PS-2100(2) or PS-2001(1)] for operation. A Photogate Port

(PS-2123) is required for photogate use with PASPORT interfaces.

**ScienceWorkshop sensors (with CI-prefix) require a ScienceWorkshop interface (CI-6400 or CI-6450 or CI-7450) for

operation.

Optional: For constant speed studies, a Motor Drive (ME-8955) with a DC power supply (SF-9584A) is recommended.

Part I: Centripetal Force vs. Velocity

In Part I of this experiment, you will vary the velocity by spinning the platform to a high, safe
velocity. The velocity decreases over time as the centripetal force is continuously measured
by the Force Sensor. The radius and mass are held constant as the velocity decreases.

Equipment Required

Rotating Platform (ME-8951)

Computer interface (

ScienceWorkshop or

PASPORT

Force Sensor (PS-2104* or CI-6746**)

DataStudio Software (ver. 1.5 or higher)

Photogate Head (ME-9498A) and/or Photogate
Port (PS-2123)*

Base support, clamps, and mounting rods

Figure 6: Motor
Drive attached to
a 3-step pulley

motor

to power supply

3-step pulley

drive belt