®
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
