How do I analyze the efficiency of a magnetic bumper other than measuring the velocity and using KE = 1/2 mv^2 to find the final and initial velocities and use that to find a fraction that tells me their relative efficiencies? I am supposed to be able to do so using an inclined track and a meter stick (assumably with the bumper at the bottom).(adsbygoogle = window.adsbygoogle || []).push({});

Also, what would the relative efficiencies be in these three collisions:

moving cart hits a stationary cart

(1) moving cart weighs more than stationary cart

(2) stationary cart weighs more than moving cart

(3) both weigh the same

Not just answers, but the logic behind it too please - thanks!!

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# Conservation of Kinetic Energy

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