Centripetal Force Apparatus - ME-8088

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Overview

The study of circular motion traditionally involves examining relationships between centripetal force, velocity, radius and mass. However, these relationships are difficult to observe using traditional physics apparatus. One common experiment involves the swinging of rubber stoppers over a student's head. The Centripetal Force Apparatus combines the "swinging mass" approach with sensors and a high-quality electric motor to create a system that allows students to discover these relationships empirically.

Typical Applications

  • Centripetal Force versus Velocity
  • Centripetal Force versus Mass
  • Centripetal Force versus Radius

Features

  • Stable Frame: The metal frame can be easily attached to a ring stand using the included clamp. The frame may also be attached to a tabletop with a large table clamp.
  • High Quality Motor: Will withstand years of student use.
  • Computer-based Measurements: The Force Sensor and photogate facilitate accurate and repeatable measurements of force, angular velocity and tangential velocity.

Includes

  • Frame with Mounted 12 VDC Electric Motor
  • Connecting Cable
  • Ball Bearing Swivel
  • Connecting Hardware for Photogate
  • Mass Holder for "Free Mass"
  • Mass Holder for "Fixed Mass"
  • 5 g Mass (2)
  • 10 g Mass (2)
  • 20 g Mass (2)
  • How It Works

    The rotating arm features a groove with two captured masses along its length. One of the masses is free to move along the length of the groove. The "free mass" is connected to a small cable that runs under a pulley in the center of the arm and up to a Force Sensor. A ball-bearing swivel is used to ensure the cable does not tangle as the arm rotates. The other mass is placed the same distance from the center as the free mass; thereby balancing the arm. A flag attached to the bottom of the "fixed mass" passes through the photogate once per revolution, allowing DataStudio to calculate the angular and tangential velocity of the mass.

    Specifications

    Rotating Arm
    • Length: 24.6 cm
    Motor
    • 12 VDC, 0.5 ampere
    Frame
    • Base: 15 x 8.5 cm
    • Back: 11.5 x 8.5 cm
    • Mass (with motor, cable, and rotating arm): 2.10 kg
    Free Mass Holder
    • 4.0 g (with screws)
    Fixed Mass Holder
    • 2.5 g (with screws)
    Thumbscrew
    • 0.5 g
    Masses
    • 5 g, 10 g, 20 g
    Ball Bearing Swivel
    • Mass: 12.5 g

    Buying Guide

    50642
    SE-8587
    Triple Output Power Supply
    1
    1391
    ME-8735
    Large Rod Base
    1
    1809
    ME-8741
    120 cm Stainless Steel Rod
    1
    1392
    ME-8736
    45 cm Stainless Steel Rod
    1
    Required

    The following are needed to build a stable supporting structure for the Centripetal Force Apparatus.

    Triple Output Power Supply   SE-8587
    Large Rod Base   ME-8735
    120 cm Stainless Steel Rod   ME-8741
    45 cm Stainless Steel Rod   ME-8736
    1506
    PS-2104
    PASPORT Force Sensor
    1
    2784368
    PS-2180
    Smart Gate
    1
    Required

    The following products are required for data collection.

    PASPORT Force Sensor   PS-2104
    Smart Gate   PS-2180

    Interface Required

    To use this product you need a PASCO interface. 

    New to probeware or have questions about  sensors or interfaces? Contact Teacher and Technical Support.  We're here to help!

    Software Required

    This product requires or recommends PASCO software for data collection and analysis. Either SPARKvue software or PASCO Capstone software may be used.