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a speed of 8.4 m/s. What is its total kinetic energy? . A trai hanving about 25,000 times more mass than a cow, strikes a stationary cow twice that of the train's orignal Erain is approximately unchanged, and the cow's velocity after the collision is ekocityThough we are being approximate, we can assume that this is an elastic collision. What percentage) of the train's original kinetic energy is transferred to the cow? LP vinyl record is spun at 72 rpm and has a diameter of 29.5 cm. What is the magnitude of the velocity of iding on the perimeter of the record (in SI units)?

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