Physics 4AL
Lab for Science and Engineering
Mechanics
Experiment #:
Lab Section:
Name:
UID:
Date:
TA:
Partner:
Lab Station:

This
** preview**
has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*
Introduction/Purpose:
This lab was devised to serve two purposes; Measure a spring constant, and prove
conservation of energy. The system is comprised of an air track, a glider that runs over
the track, springs on either side of the glider which are mounted to the respective side of
the air track, and a mass that hangs off of one side of the track.
By hanging a mass, a force is exerted on the springs, which displaces them from
there natural position. By measuring this displacement, we can measure the spring
constant of the springs.
In order to measure conservation of energy, we use a photo gate to measure how
many tick marks on top of the glider pass by as the glider moves down the track. By
measuring the number of tick marks, the displacement can be determined. By measuring
the interval between each tick mark, we can then measure time and velocity. Knowing
these three pieces of information, we can then determine the potential energy, kinetic
energy, and the total energy.
Theory/Equations:
The theory behind this experiment is of conservation of energy. The first step is to
figure out the spring constant, as it is integral to the potential energy in this case. The
second step is to figure out the velocity, as it is integral to the kinetic energy. With these
two values, total energy can be obtained, and thus, conservation can be shown if it in act
is true. The necessary equations are…
F=-kx (Force = - Spring Constant x Displacement)
Potential Energy =
½ kx²
Kinetic Energy =
½ mv² = ½ V²(M + m/3)*
Total Energy = Potential Energy + Kinetic Energy
Velocity = .004m/T1
* The second equation for kinetic energy factions in the energy associated with the
springs.
Procedure:
The first step in the process is to measure the weight of each of the hanging
masses, as well as the glider and the springs. For part A, we set up the air, leveled it to get
rid of as much error as possible, and placed the glider on top. We then connected a spring

This is the end of the preview.
Sign up
to
access the rest of the document.