Energy efficiency lab

 Measurement

 

Odd Tables:  Take the measurements necessary to determine the kinetic energy of the cart just before and after the impact with the bumper. Take data for several different initial heights.


Analysis

Calculate the efficiency of the bumper for the level track.  Does your result depend on the velocity of the cart before it hits the bumper?



Conclusion

What is the efficiency of the magnetic bumpers? 

The efficiency was 90.68 +- 5.01%, it seemed that most trials were pretty high up there in efficiency with the lowest percentage being 89% which is not bad for the leveled track. The result does depend on the velocity of the cart since as the velocity increased the percentage went higher. 

 How much energy is dissipated in an impact? State your results in the most general terms supported by your analysis. Is the effect of friction significant?

The average energy dissipated across all trials is 7.557 × 10^−4 J using the initial and final velocities and the mass of the cart. The effect of friction is not significant in this. 

Compare your value of the efficiency (with uncertainty) with the value obtained by your partners procedure.  Are the values consistent?  Which way to measure the efficiency of the magnetic bumper do you think is better?  Why?

Table 2 which had an inclined track had a value of efficiency of 72.4 +- 0.65% and the value of efficiency table 3 had which they also had a leveled track was 90.285 +- 5.091% which was pretty similar to ours and based off both of those values shows that the leveled track is more efficient than the inclined track. 

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