Thursday, April 23, 2015

Lab #10: Work-Kinetic Energy Theorem

Experiment 1: Work Done by a Nonconstant Spring Force

Purpose: To calculate the spring constant by using Hooke's Law



Procedure:
1) We first calibrated a force sensor by zeroing it with no mass hanging and then added 500grams setting the sensor to read 4.9N.

2) We set up a track on our table, a cart attached by a spring to the force sensor, which is held horizontally on one end of the track by a clamp and bar. On the other end we have a motion sensor to read the distance the cart will be pulled.

3) Using logger pro we collect data from both the force and motion sensors and plot them to create a graph of force vs distance.



4) Using a Linear fit we find the slope(spring constant) to be 5.724 N/m.

5) By measuring the area under the curve(integrating) we have now calculated the work done by the spring, .05 N*m

Experiment 2: Kinetic Energy and the Work-Kinetic Energy Principle

Procedure:
1) First we must create a new calculated column for kinetic energy of the cart, .5mv^2

2)Using the same set up as before we will now Release the cart from a stretched position and allow logger pro to graph both KE and Force against the distance.





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