Vernier Dynamics System - Manual (Page 5)

9
Sample Experiment
An example of a typical experiment done with the Vernier Dynamics system is a two
cart, inelastic collision
for studying momentum
conservation.
This experiment takes
two motion detectors,
since both carts are in
motion. A Motion
Detector is placed just a
few centimeters from
each end. For this
experiment, in
Logger Pro the
direction of one detector
was reversed, and then
both detectors are zeroed with the carts stuck together near the middle of the track.
This places the origin of the common coordinate system near the middle, and the two
readings will then be the same when the carts are in contact.
The Vernier carts had the hook and pile tabs in place to create a completely inelastic
collision. After starting data collection, the carts were rolled toward one another,
with one cart moving a bit faster than the other. On collision, the hook and pile tabs
held the carts together as they roll on.
Note several features of the graph:
 Before the collision, the carts are moving with constant velocities of opposite
sign, since they are moving toward one another.
 The carts move as a unit after the collision with a common, constant velocity.
Both carts are very nearly 0.500 kg; the total momentum before the collision is then
0.184 kg m/s. Afterward, the momentum is 0.183 kg m/s.
10
Suggested Accessories
Dynamics Track Adapter (DTA-DFS). The DTA is used
to attach a Dual Range Force Sensor to a track in
several different positions. Magnetic bumpers for the
DFS are included.
Optics Expansion Kit
(OEK). The Vernier Optics Expansion Kit extends
the Vernier Dynamics System for use in optics
experiments.
Color Mixer (CM-OEK). The Vernier Color Mixer
Kit consists of a three-color LED illuminator with
power supply, a lens, and a double-sided screen.
Experiments in additive and subtractive color
mixing can be easily and conveniently carried out
using this kit. The intensity of the red, blue and
green LEDs can be smoothly controlled from the
light source.
Additional Track (TRACK). Add another track to your system.
Track-to-Track Coupler
(T2T-VDS). The Track-to-
Track Coupler rigidly connects
two tracks for larger
experiments and
demonstrations.
Ultra Pulley (SPA). The pulley can be attached to the end of a
track using the Pulley Bracket to make a half-Atwood machine.
Pulley Bracket (PB-SPA).
The pulley bracket allows
easy attachment of an Ultra
Pulley to the end of a
Vernier track. Compatible
with a photogate bracket for measuring
motion using the pulley.