a 180 lbs halfback running at a speed of 8.0 m/s collides head on with a 260 lbs

Question

a 180 lbs halfback running at a speed of 8.0 m/s collides head on with a 260 lbs tackle running at 3.0 m/s. how many times more energy does the heavier tackle have over the lighter halfbacks. (note: give the ratio of the energy of the tackle to that of the halfback) a 180 lbs halfback running at a speed of 8.0 m/s collides head on with a 260 lbs tackle running at 3.0 m/s. how many times more energy does the heavier tackle have over the lighter halfbacks. (note: give the ratio of the energy of the tackle to that of the halfback)

Explanation / Answer

KE = 1/2mV^2

=>ratio = lighter to heavier = KE1/KE2 = 1/2*180*8^2)/(1/2*260*3^2) = 4.92

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