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금요일, 5 12월 2008, 08:19 오전 에 Shin Seoggyun
 

Conservation of Momentum

Determine the momentum before and after an inelastic collision between two carts.

Students use velocity and mass information in a 2-cart system to see that momentum is conserved.

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Lab Summary

Students will use Motion Sensors to investigate the conservation of momentum. Students will measure the velocity of two carts before and after an inelastic collision.

Theory

In an inelastic collision (as in all collisions) the total momentum of the system remains constant.  As the two carts move toward one another, one with (positive velocity and one with negative) this initial momentum will prove the same as the momentum of both carts after they collide and move together as one object.  This fact is confirmed with readings from the Motion Sensors and knowledge of each cart's mass.

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Method

Use two Motion Sensors to measure the motion of two carts before and after they collide. Compare the momentum of the carts before they collide with the momentum after they collide.

Here's What You Need

U.S. Educator prices shown.

Required for computer-based lab: (See lab download for Xplorer GLX-based lab requirements, which may differ)

Probeware

 
PASPORT Motion Sensor (PS-2103A)

Our Motion Sensor uses ultrasonic pulse ranging technology to help focus on the target and ignore false targets.

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Xplorer GLX (PS-2002)
(or alternate PASPORT interface — see other options)

The world's first graphing logger for science that truly stands alone... the Xplorer GLX captures, analyzes, annotates, stores and prints data quickly and seamlessly, without being connected to a computer.

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Other Products

PAScar 1.2 meter Dynamics System (ME-6955)

The PAScar 1.2 m Dynamics System equips your lab with carts and a high-quality aluminum track for Newton's Laws, collisions, velocity and acceleration experiments.

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OHAUS, Triple-Beam Balance (without Tare) (SE-8723)

This Ohaus triple-beam mechanical balance (without tare) has been a standard weighing instrument in student laboratories for decades.

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Lab Manual

The computer-based activity is included in Explorations in Physics (PS-2810). The Xplorer GLX-based lab is included in Physics with the Xplorer GLX (PS-2826). Both manuals are complete with Teacher Information pages, student instructions and handouts, and sample data.

For your convenience, we offer bundles which provide the probeware for the activities in the manual. For more, please see:
Computer-based Physics Lab Manual and Bundles
Xplorer GLX-based Physics Lab Manual and Bundles

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